This is a respect thread for Palpatine's Revenge of the Sith incarnation, made in succession of my TPM Palpatine respect thread. It will be followed by a RotJ/OT and DE respect thread. Just as with the TPM respect thread, only feats and accolades referring to Palpatine up to this time will be used. None that refer to him after RotS, even if only by a short time, will be used (these will go in the RotJ respect thread). Though this was created when the EU was still Canon, I have marked the feats that are Canon, with most being applicable to both the Canon and Legends timelines. Everything else is exclusive to Legends.

Respect Darth Sidious:

Power

Canon: Darth Sidious is the most powerful being in the galaxy as of Son of Dathomir:

By restoring Maul’s powers, Talzin hoped to defeat Sidious and become the most powerful being in the galaxy.

Source: Databank: Mother Talzin

Canon: Darth Sidious is even more powerful than the Jedi:

"Ian is a classical Shakespearean actor; you know, the last thing in the world that he can do, or wants to do, is be a Jedi Master. You know, he is not a Jedi Master, he's got to be even more powerful than the Jedi."

Source: https://youtu.be/GjdycGgeaIY?t=281

Palpatine possesses almost unlimited Force powers:

Sidious possesses almost unlimited Force powers.

Source: Beware the Sith

Darth Sidious has continuously grown in power ever since The Phantom Menace:

Beyond the vision of the Jedi Knights, somewhere within the darkness, the greatest master of evil ever to use Sith power bides his time. As his strength grows, his plans begin to shape the course of the galaxy, and his snares await the unsuspecting.

Source: The Complete Visual Dictionary

Sidious is the most powerful Sith Lord in modern history:

Palpatine is the most powerful member of the Order of the Sith Lords:

The Sith have waited millennium for the birth of one who is powerful enough to return them from hiding. Darth Sidious is that one—the Sith's revenge on the Jedi order for having nearly eradicated the practitioners of the dark side of the Force.

Source: The Complete Visual Dictionary

The Sith Order, in hiding for a millennium, had awaited the birth of one who was powerful enough to return the Order to prominence. Darth Sidious was the fulfillment of that prophecy, capable of exacting the Sith's revenge on the Jedi for having nearly eradicated the practitioners of the dark side of the Force.

Source: The Complete Star Wars Encyclopedia

Darth Sidious proved to be the grim culmination of a thousand years of Sith philosophy and teachings.

Source: Jedi vs Sith: The Essential Guide to the Force

For a thousand years we continued to follow Bane's Rule of Two, existing in the shadows, biding our time, growing in power, feeding our hatred. Darth Sidious proved to be the splendid culmination of a thousand years of Sith philosophy and teachings.

Source: Insider #88: Heritage of the Sith

When the Sith finally emerged from a thousand years of watching and waiting, they numbered—in accordance with the tradition set down by Darth Bane—only two. The most powerful of these was Darth Sidious, an ice-cold, diabolically calculating genius equipped with the strength of the dark side of the Force, as well as an enormous wealth of Sith artifacts, equipment, and knowledge.

Source: The Dark Side Sourcebook

Palpatine is the most powerful Sith Lord in history:

Meet Darth Sidious - the most powerful Sith Master who ever lived.

Source: Darth Maul, Sith Apprentice

Beyond the vision of the Jedi Knights, somewhere within the darkness, the greatest master of evil ever to use Sith power bides his time. As his strength grows, his plans begin to shape the course of the galaxy, and his snares await the unsuspecting.

Source: The Complete Visual Dictionary

Finally - the Emperor - who should be fighting to save the Republic - is revealed as the most powerful and menacing Sith of all!

Source: The Sith (Revenge of the Sith Collection, 2005)

"Master Yoda..." He steepled his fingers. "Are you quite certain young Anakin is ready for such a task?"

"Yes," said Yoda flatly.

And that was a lie. Yoda was a master at masking his emotions, but not even he could hide them from the greatest Sith Lord ever known. He was worried...and backed into a corner.

Source: The Clone Wars: Wild Space

When Yoda crosses sabers with the movie's arch-villain, he doesn't launch into a pinwheeling display of acrobatics, as he did against Count Dooku in Episode II. Instead, Yoda faces the dark side's fury, channeled by the most powerful Sith Lord in history. "Rob Coleman wanted Yoda to feel the power of his enemy," says Wheless, "like a force he's never dealt with before."

Source: Insider #86: Yoda's Right Arm

Yoda went after Palpatine in the empty Senate chamber, but could not defeat the most powerful Sith Lord in history.

Source: The New Essential Chronology

When the most powerful Jedi battled against the most powerful Sith, the two sides of the Force clashed in spectacular style.

Source: Jedi Battles

With the galaxy now ripe for conquest, the Emperor has become the most powerful Sith Lord of all and a master of the Dark Side of the Force, ordering the extermination of the Jedi Order with the aid of his apprentice, the deadly Darth Vader.

Source: Legends Epic Collection: The Empire Volume 1

His power may be unparalleled in the history of the Sith.

Source: Force & Destiny

Sidious is the most powerful practitioner of the dark side of the Force up to and of his time:

Inside the spacious interior of the Galactic Senate chamber, Yoda challenged the Emperor. The two engaged in a spectacular duel—a contest between the most powerful practitioners of the Force’s light and dark sides.

Source: The Complete Star Wars Encyclopedia

Maul senses Palpatine's presence and arrival on Mandalore, seeing him as a dark sun blazing with simultaneously hypnotizing and terrifying power:

The feeling had begun as a faint stirring in the Force, like the tiniest ripple of something moving slowly through deep water, far away but drawing steadily closer. It intensified, until it felt like the Force itself was roiling, heaving like the sea in the grip of an enormous storm.

“I sense a presence,” Maul warned Savage. “A presence I haven’t felt since...”

And then Maul knew.

“Master,” he said, leaning forward on the throne.

The commandos guarding the royal chamber reached for their throats. As Maul watched, an unseen forced lifted them high in the air, then slammed them to the floor, where they lay motionless in their red-and-black armor. The doors opened, then closed behind a figure in dark robes. A deep cowl hid most of the face, leaving only a pale chin and a downturned mouth visible. To most eyes the man in those simple robes of rough cloth was unremarkable, just another being making his way in the universe. But to those who could feel the Force he was anything but ordinary. To them, he was a dark sun blazing with power that was simultaneously hypnotizing and terrifying to behold.

Darth Sidious, the reigning Dark Lord of the Sith, had come to Mandalore.

Source: Darth Maul: Shadow Conspiracy

Canon: Sidious is much more powerful than Darth Maul:

Yeah, I think that’s pretty literal at that point. I think that what you understand about Maul is that he is still not nearly as powerful as Sidious.

Source: Dave Filoni (Death Watch/Darth Maul Arc & Casualties Along the Way)

Canon: Sidious' mere holographic presence radiates enough power for Ventress to regard him as more steeped in the dark side than Vos and possibly even Dooku had ever been:

"Darth Tyranus," intoned Count Dooku's Master. Even though he wasn't physically present, the simple sound of his voice - rasping, papery, somehow, like the rustling of ancient parchment - sent a shiver through Ventress. This man was steeped in the dark side of the Force, saturated with it, in a way that she was certain Vos, perhaps even Dooku, had never been.

Source: Dark Disciple

Dooku dares not question Sidious' power:

Really, sometimes it seemed to Dooku that Darth Sidious's plots were needlessly complex. It was beginning to look very much as if Dooku could simply win: march his battle droids into Coruscant and claim the Republic outright.

Not that he would ever question the power of Darth Sidious.

Source: Yoda: Dark Rendezvous

Standing in the presence of Darth Sidious, even as a hologram, causes Dooku to feel old and stripped of his Force augmentation:

Physically, the Count's age was rarely a handicap. Deft as he had become with the Force—unimaginably more subtle than the boy who had watched waterskeeters in the Jedi gardens all those years ago—he wore his eighty-three standard years better than most humans half his age. He was still in superb physical shape, senses keen, health undiminished by even the memory of a cold.

Only in this situation, stooped before the image of his Master, did he feel his years. Even via hologram, the flickering figure of Darth Sidious, hideous in blue and shadows, seemed to strip his false youth away, leaving his bones brittle, his joints worn thin and knotted with tension.

Source: Yoda: Dark Rendezvous

Sidious's mere holographic presence on Vjun causes a weather storm:

Outside, the wind picked up another notch, shrieking and groaning among the eleven chimneys as if to announce the arrival of a hideous guest. Dooku's comm console chimed. He glanced over, expecting the daily report from General Grievous, or perhaps a message from Asajj Ventress. He reached over to open the channel, ecognized the digital signature of the incoming transmission, jabbed the channel open, and snapped to his feet. "You called, my Master?"

The hologrammic projector on his desk sprang to life, and the wavering form of Darth Sidious regarded him. As always the picture was oozy and unclear, as if light itself were uneasy in the presence of the Lord of the Sith. Dark robes, purple shadows—a patch of skin, pale and mottled under his hooded cloak like a fungus growing under a rotten log. From under heavy lids the Master's eyes, snake-cold and serpent-wise, regarded him.

"What would you have of me, Master?"

"From you? Everything, of course." Darth Sidious sounded amused. "There was a time when I wasn't sure if you would be able to overcome that...independent streak of yours. After all, you were born to one of the wealthiest families in the galaxy, with gifts and abilities far, far greater than any amount of wealth could bestow. Your understanding is deep; your will, adamant. Is it any wonder you should be proud? Why, how could it be otherwise?"

Dooku said, "I have always served you well and faithfully, my Master."

"You have. But you must admit, your spirit was not made for fidelity. After all, a man who will not bow to the Jedi Council, or even Master Yoda...I wondered if perhaps loyalty was too mean, too confining a thing to ask from so great a being as yourself."

Dooku tried to smile. "The war progresses well. Our plans are on schedule. I have dealt out your deaths, your schemes, your betrayals. I have paid for your war with my time, my riches, my friends, and my honor."

"Holding nothing back?" Sidious asked lightly.

"Nothing. I swear it."

"Excellent," Darth Sidious said. "Yoda came to the Chancellor's office this morning. He is going on a very special mission. Top secret." He laughed, a harsh sound like the bark of a crow. The wind rose again, shrieking around the mansion like a creature in torment. "When he arrives, Dooku...see that you treat him."

Darth Sidious laughed. Dooku wanted to laugh along, but couldn't quite manage it before his Master cut the connection and disappeared.

***

Dooku paced his office. With the end of Sidious' call, the storm had slackened, and the shrieking wind outside now only sobbed quietly under the gables of Château Malreaux.

Source: Yoda: Dark Rendezvous

When Dooku perceives Palpatine through the Force, he sees that he is "beyond power", a "black hole of the Force", "darkness beyond darkness", and an "event horizon":

And then there was Palpatine, of course: he was beyond power. He showed nothing of what might be within. Though seen with the eyes of the dark side itself, Palpatine was an event horizon. Beneath his entirely ordinary surface was absolute, perfect nothingness. Darkness beyond darkness.

A black hole of the Force.

Source: Revenge of the Sith

Canon: Palpatine is stronger than any dark sider Yoda has faced (ie. Count Dooku, Asajj Ventress):

Never had Yoda faced one so strong in the dark side.

Source: Revenge of the Sith Junior Novelization

Instead, Yoda faces the dark side's fury, channeled by the most powerful Sith Lord in history. "Rob Coleman wanted Yoda to feel the power of his enemy," says Wheless, "like a force he's never dealt with before."

Source: Insider #86: Yoda's Right Arm

Canon: Darth Sidious proves too strong for Yoda to defeat, overwhelming him with the power of the dark side:

Inside the spacious interior of the Galactic Senate chamber, Yoda challenged the Emperor. The two engaged in a spectacular duel—a contest between the most powerful practitioners of the Force’s Light and Dark Sides. The Emperor proved too powerful to defeat.

Source: The Complete Star Wars Encyclopedia

Yoda went after Palpatine in the empty Senate chamber, but could not defeat the most powerful Sith Lord in history.

Source: The New Essential Chronology

Though Yoda is a tough combatant, the Emperor uses his Sith powers to release lightning bolts and hurl floating platforms at his foe. Ultimately the battle proves too much for Yoda, who barely escapes and is whisked away to safety by Senator Bail Organa.

Source: Ultimate Star Wars

Yoda confronted Sidious in the heart of the Senate chambers. This erupted into an intense duel between these masters of the Force, a fight that Yoda ultimately lost and was forced to flee.

Source: Databank: Yoda

Master Yoda made a last-ditch attempt to stop him, and their fight spilled over into the now-empty Senate rotunda. Darth Sidious overwhelmed Master Yoda with the destructive energy of the dark side, and the Jedi Master fled Coruscant.

Source: Databank: Darth Sidious

Yoda is eventually outmatched by Sidious.

Source: Databank: Star Wars: Revenge of the Sith Story Gallery

The Jedi Master and the Sith Lord dueled in the Senate chamber, but Sidious was too strong for Yoda to defeat.

Source: Databank: Coruscant History Gallery

A fierce duel commenced. Yoda and Darth Sidious each used his side of the Force to try to defeat the other. But the Sith Lord's powers were too strong.

Source: Revenge of the Sith Canon Junior Novelization

Force Knowledge

Sidious has access to numerous Sith relics obtained by Mas Amedda:

Thus, despite the noble ideals he’d once held so dear, Amedda subsumed himself to the Grand Plan, hunting Sith relics for his master on worlds such as Yavin 4, and standing by Palpatine’s side when he declared himself ruler of a Galactic Empire that would endure 10,000 years.

Source: Barely Tolerable: Alien Henchmen of the Galactic Empire Part 3

Dark Rage/Protection/Speed

Dark Rage is a dark-sided power enabling a Sith to enhance his resolve and physical traits. Force Protection is the passive (and sometimes active) enhancement of a Force sensitive's durability to varying superhuman degrees. Force Speed is the passive (and sometimes active) enhancement of a Force sensitive's speed to varying superhuman degrees.

Strength

Sidious is able to ward off Savage and Maul's combined strength:

Maul and Savage didn’t waste time seeking an advantageous position. They simply charged, blades shimmering, trying to overpower Sidious with the animal ferocity of their attack. Sidious caught their sabers on his, the weapons howling and crackling where they touched. Maul saw that Savage was startled by the seemingly frail man’s enormous strength. Maul stared at his Master’s face. He saw the strain as Sidious called upon the Force to keep the brothers at bay. But there was something else there, too—a terrible pleasure. Sidious began to grin.

Source: Darth Maul: Shadow Conspiracy

Canon: He is unharmed by a Force Rage-amped Maul's kick:

Canon: Sidious overpowers a Force Rage-amped Maul in a saberlock:

Palpatine is able to carry Darth Vader's heavily burnt body and effortlessly leap up a cliff:

And on Mustafar, below the red thunder of a volcano, a Sith Lord had already snatched from sand of black glass the charred torso and head of what once had been a man, and had already leapt for the cliffbank above with effortless strength, and had already roared to his clones to bring the medical capsule immediately!

Source: Revenge of the Sith

Speed

Canon: Ian McDiarmid hyperbolically claims that Sidious can use his lightsaber "five hundred times as fast as anyone else":

But I didn't know he could use a lightsaber, and twice as fast, in fact, no, five hundred times as fast as anyone else.

Source: Becoming Sidious

Sidious is astonishingly fast and efficient, leaving Darth Maul in awe of him:

But strong as he had become, Maul found himself in awe of Sidious. The Sith Lord was astonishingly fast and efficient, and the Force flowed through him effortlessly.

Source: Darth Maul: Shadow Conspiracy

Sidious fights so fast that Maul sees his movements only as a blur. Eventually, Maul sees countless lightsaber blades, and then "even more than that", disarming Maul in one strike:

Sidious raised his saber and flew at Maul, who parried desperately, his mechanical legs whirring as he sought to counter his former Master’s blows. Sidious’s sabers were a blur, a whirling cage of deadly plasma. Maul danced away from one blow, then reversed his movement to avoid another, and then there were too many to count, and then there were even more than that.

Maul’s saber spun out of his hand, bouncing away across the floor.

Source: Darth Maul: Shadow Conspiracy

Canon: Sidious is able to kill Agen Kolar and Saesee Tiin before they (or Mace Windu and Kit Fisto) can react, then cuts down Kit Fisto in short order even whilst fighting Mace Windu at the same time:

He turned desperately to Saesee Tiin. "Master Tiin—you're the telepath. What am I thinking right now?" Tiin frowned and cocked his head. His blade dipped. A smear of red-flashing darkness hurtled from behind the desk. Saesee Tiin's head bounced when it hit the floor. Smoke curled from the neck, and from the twin stumps of the horns, severed just below the chin.

Kit Fisto gasped, "Saesee!"

The headless corpse, still standing, twisted as its knees buckled, and a thin sigh escaped from its trachea as it folded to the floor.

"It doesn't..." Agen Kolar swayed. His emerald blade shrank away, and the handgrip tumbled from his opening fingers. A small, neat hole in the middle of his forehead leaked smoke, showing light from the back of his head. "...hurt..." He pitched forward onto his face, and lay still.

...

Green fans, sheets of purple— And crimson flame. He was too late. The green fire faded and winked out; now the lightning was only purple and red.

Source: Revenge of the Sith

Before the Jedi could react, Palpatine sprang into action and killed all of them except Mace Windu.

Source: http://www.starwars.com/databank/palpatine-biography-gallery

Before Mace realizes what has happened, Kolar, Tiin, and Fisto have fallen to Sidious's blade.

Source: The Complete Visual Dictionary

Here - in a lavish Senatorial office atop one of the tallest buildings on Coruscant - the endgame of the conflict between Sith and Jedi begins. Revealed as a Dark Lord of the Sith - Chancellor Palpatine vaults across his desk with the uncanny speed of a master in the Force - his lightsaber blazing to life. Its blade carries the swift death of no less than three Jedi.

Source: Jedi vs Darth Sidious 5-Pack (The Sage Collection, 2006)

As Palpatine duels Mace Windu, he moves so quickly that Anakin Skywalker perceives him as indecipherable blur:

Anakin blinked and rubbed his eyes again. Maybe he was still a bit flash-blind—the Korun Master seemed to be fading in and out of existence, half swallowed by a thickening black haze in which danced a meter-long bar of sunfire. Mace pressed back the darkness with a relentless straight-ahead march; his own blade, that distinctive amethyst blaze that had been the final sight of so many evil beings across the galaxy, made a haze of its own: an oblate sphere of purple fire within which there seemed to be dozens of swords slashing in all directions at once.

The shadow he fought, that blur of speed—could that be Palpatine?

Their blades flared and flashed, crashing together with bursts of fire, weaving nets of killing energy in exchanges so fast that Anakin could not truly see them—but he could feel them in the Force. The Force itself roiled and burst and crashed around them, boiling with power and lightspeed ricochets of lethal intent. And it was darkening.

Source: Revenge of the Sith

Sidious and Yoda fight so fast that their movements and attacks form a "tornado":

In that lightning-speared tornado of feet and fists and blades and bashing machines, his vision finally pierced the darkness that had clouded the Force.

Source: Revenge of the Sith

Durability

Canon: Sidious is unharmed by Savage ramming into him:

Canon: He is unharmed by a Force Rage-amped Maul's kick:

Canon: Palpatine withstands his Lightning being reflected into his face for 40 seconds without suffering any genuine damage (his false appearance is burned off but his claims of weakness are feigned):

https://youtu.be/q0r4jNhG9Z4?t=176

But Master Windu wasn't listening. He raised his lightsaber — and Anakin knocked it aside. The unexpected blow sent the lightsaber flying... And left Mace defenceless against a new bolt of Force Lightning. Chancellor Palpatine was faking! He wasn't tired at all.

Source: Revenge of the Sith Junior Novelization

Palpatine is completely unaffected by Darth Vader's Force Scream and telekinetic outbursts:

And you rage and scream and reach through the Force to crush the shadow who has destroyed you, but you are so far less now than what you were, you are more than half machine, you are like a painter gone blind, a composer gone deaf, you can remember where the power was but the power you can touch is only a memory, and so with all your world-destroying fury it is only droids around you that implode, and equipment, and the table on which you were strapped shatters, and in the end, you cannot touch the shadow.

Source: Revenge of the Sith

Sense/Sight/Precognition/Farsight

Force Sense is a basic power that enables a Force user to feel or sense events, people, and objects. Force Sight is a power that enables one to see through the Force, either in supplementation with or compensation for their physical sight. Precognition allows one to foresee the future, but often on a very limited and short-term scale. Farsight allows a Force user to identify events that occur in other places or other times, or both.

Canon: Sidious knows in advance that Count Dooku would return to Coruscant after the Battle of Geonosis. Dooku additionally muses that Sidious always knows of his arrivals in advance:

As he lowered the ramp, he saw a hooded figure waiting in the shadows. He always knows, the Count thought. But then, he should. That is why he is the Master.

Source: Attack of the Clones Junior Novelization

Canon: Sidious senses Satine Kryze's death at the hands of Darth Maul, which prompts him to travel to Mandalore and confront his former apprentice:

Throughout this time, Maul dueled Obi-Wan Kenobi on numerous occasions, and in an act of pure hatred, killed Obi-Wan’s former love, Duchess Satine Kryze. His revenge would prove double-edged, however, as the act created a dark side ripple sensed by his former Master, Darth Sidious.

Source: Databank: Darth Maul

Maul's hateful act garnered unwanted attention, however; across the galaxy, Darth Sidious detected a tremor in the Force and soon left for Mandalore

Source: Databank: Darth Maul

He can sense every move Maul and Savage will make before they are made:

But strong as he had become, Maul found himself in awe of Sidious. The Sith Lord was astonishingly fast and efficient, and the Force flowed through him effortlessly. His sabers stabbed and slashed through the smallest hole in an opponent’s guard, his movements never carried him a millimeter out of position, and he could sense every attack Maul and Savage made before it developed.

Source: Darth Maul: Shadow Conspiracy

Sidious knows details that Tyranus does not inform him of:

Even via hologram, the flickering figure of Darth Sidious, hideous in blue and shadows, seemed to strip his false youth away, leaving his bones brittle, his joints worn thin and knotted with tension. "These are the envoys from Troxar," his Master said. How could he know? Dooku didn't ask. Darth Sidious knew. He always knew.

Source: Yoda: Dark Rendezvous

Canon: Sidious senses Yoda's presence on Moraband:

https://www.youtube.com/watch?v=yxiXU6xXxoI

Palpatine has the ability to discern currents of the Force that comprise the future, and the ability to comprehend that they are not boundless. In this way, he possesses the ability to "divine actions taken well in advance of their own deciding":

Once again, Darth Sidious had divined the actions they would take well in advance of their own deciding. The talent had less to do with being able to peer into the future, than with having access to streams of possibilities. Sidious wasn't unerring. He could be surprised or taken off his guard—as at Geonosis, as in the case of Gunray's mechno-chair—but not for long. His mastery of the dark side of the Force endowed him with the power to decipher the currents that comprised the future, and to comprehend that while those currents were manifold, they were not boundless. Such mastery was one of the skills that distinguished Sidious from Yoda, who believed the future was so much in motion it could not be read with any clarity—especially during times when the dark side was on the ascendant.

Source: Labyrinth of Evil

Palpatine senses the arrival of Mace Windu and his arrest party, as well as the approach of Anakin Skywalker:

The Coruscant nightfall was spreading through the galaxy. The darkness in the Force was no hindrance to the shadow in the Chancellor's office; it was the darkness. Wherever darkness dwelled, the shadow could send perception. In the night, the shadow felt the boy's anguish, and it was good. The shadow felt the grim determination of four Jedi Masters approaching by air. This, too, was good.

Source: Revenge of the Sith

Sidious looks to the Force to determine a Sith name for Anakin Skywalker:

Darth Sidious laid a pale hand on Anakin's brow. "Then it is done. You are now one with the Order of the Dark Lords of the Sith. From this day forward, the truth of you, my apprentice, now and forevermore, will be Darth..."

A pause; a questioning in the Force—

An answer, dark as the gap between galaxies—

He heard Sidious say it: his new name.

Vader.

A pair of syllables that meant him. Vader, he said to himself. Vader.

Source: Revenge of the Sith

Sidious senses that Anakin is not fully attuned to the dark side:

He sensed that his apprentice was not yet as fully committed to the dark side as he should be. Well, destroying the Jedi here should certainly tie Anakin closer to his Sith identity - Darth Vader.

Source: Revenge of the Sith Junior Novelization

He feels the deaths of the Jedi during Order 66 across the galaxy, and senses that the dark side grows stronger with each Jedi death:

Still smiling, Darth Sidious leaned back, picturing the scenes all over the galaxy. Jedi on jungle planets, crystal worlds, water worlds, in the heat of battle and safe in their command centers, all dying at the hands of their own clone troops. He could sense it happening, though not in detail - but he could feel the dark side growing stronger with every Jedi death.

His only regret was that he couldn't be there in person to watch each one of them die.

Source: Revenge of the Sith Junior Novelization

He senses Yoda weakening against his Lightning:

The end came with astonishing suddenness. The shadow could feel how much it cost the little green freak to bend back his lightnings into the cage of energy that enclosed them both; the creature had reached the limits of his strength.

Source: Revenge of the Sith

Sidious senses that Darth Vader is in danger:

The image tilted its head, its smile twisting without transition to a scowl. "Lord Vader—I sense a disturbance in the Force. You may be in danger."

He glanced at the mirror flash outside; he knew that ship. In danger of being kissed to death, perhaps...

"How should I be in danger, Master?"

"I cannot say. But the danger is real; be mindful."

Be mindful, be mindful, he thought with a mental sneer. Is that the best you can do? I could get that much from Obi-Wan... "I will, my Master. Thank you." The image faded. He got to his feet, and now the sneer was on his lips and in his eyes. "You're the one who should be mindful, my 'Master.' I am a disturbance in the Force."

Source: Revenge of the Sith

Clone troops were already swarming into it. "It was Yoda," he said as he swung out of the pod. "Another assassination attempt. Find him and kill him. If you have to, blow up the building." He didn't have time to direct the search personally. The Force hummed a warning in his bones: Lord Vader was in danger. Mortal danger.

Source: Revenge of the Sith

Sidious nodded and reached out with the dark side, trying to sense where his enemy was hiding. As he did, the feeling of risk grew stronger, and he understood. Not a threat to him, but to his apprentice. He must see to this personally. "Double your search," he told the clone commander, though he doubted they would find anything. He turned to Mas Amedda. "Tell Captain Kagi to prepare my shuttle for immediate takeoff. I sense Lord Vader is in danger."

Source: Revenge of the Sith Junior Novelization

Telekinesis

Telekinesis is a Force power enabling one to manipulate reality around them with the power of their mind.

Canon: He effortlessly Chokes a pair of Mandalorians, then operates a control panel and leaves the scene whilst still Choking the two Mandalorians to death:

The unmarked shuttle landed on the royal palace’s platform, reserved for Mandalore’s rulers and their most important advisers. The ramp lowered and a hooded figure in dark robes descended. The commandos rushing to intercept him reached for their throats, gagging, and the cloaked figure swept past them without a sideways glance, gaze fixed straight ahead.

Source: Darth Maul: Shadow Conspiracy

Canon: He effortlessly opens a door Chokes a pair of Mandalorians, hurling them against a wall and leaving them to strangle to death before dropping their corpses:

The commandos guarding the royal chamber reached for their throats. As Maul watched, an unseen forced lifted them high in the air, then slammed them to the floor, where they lay motionless in their red-and-black armor.

Source: Darth Maul: Shadow Conspiracy

Canon: Palpatine hurls Darth Maul and Savage Opress against a wall and pin them there. They are able to come down to fight him solely through his allowance:

He raised his arms and both Maul and Savage flew through the air, smashing into the elegantly patterned walls of the royal chamber and crashing to the floor.

Source: Darth Maul: Shadow Conspiracy

Canon: Palpatine Pulls both Maul and Savage off a balcony effortlessly:

Canon: Sidious incapacitates Maul by Pushing him into a wall:

Snarling, he reached out with the Force and slammed Maul against the wall, leaving him lying stunned in a heap.

Source: Darth Maul: Shadow Conspiracy

Canon: He throws the mortally wounded Savage:

Sidious yanked his weapon back and Savage seemed to hang suspended for a moment, as if he were being levitated by with the Force. Then he crashed to the ground.

Source: Darth Maul: Shadow Conspiracy

Canon: Sidious ragdolls Maul:

Then Sidious seized his former apprentice with the Force, hurling him against the wall. Maul’s vision swam. He tried to get up, but realized he was already in the air, held aloft by the Force. Sidious slammed him into the floor. Then Maul was off the ground again, legs kicking for purchase in empty air. He could taste blood in his mouth. His head hit the wall with a sickening crunch.

A rhyme crept into his head, a nagging sing-song bit of poetry.

Far above, far above,

We don’t know where we’ll fall.

Far above, far above.

What once was great is rendered small.

Maul could no longer remember where he had heard it, or what it meant. He was broken, helpless, useless.

“No,” Maul heard himself gasp. “Have mercy. Please...”

Source: Darth Maul: Shadow Conspiracy

Canon: Sidious Chokes Darth Tyranus from across the galaxy, lifting him off his feet and into the air with minimal effort:

He opens a hidden compartment and levitates a robe down to him:

He gestured, and a hidden compartment opened in the office's ceiling above his desk. A voluminous robe of heavy black-on-black brocade floated downward from it; Anakin felt the current in the Force that carried the robe to Palpatine's hand.

Source: Revenge of the Sith

Canon: Sidious casually hurls several Senate pods at Yoda whilst simultaneously levitating the pod he stands on and several others:

There came a turning point in the clash of the light against the dark. It did not come from a flash of lightning or slash of energy blade, though there were these in plenty; it did not come from a flying kick or a surgically precise punch, though these were traded, too. It came as the battle shifted from the holding office to the great Chancellor's Podium; it came as the hydraulic lift beneath the Podium raised it on its tower of durasteel a hundred meters and more, so that it became a laserpoint of battle flaring at the focus of the vast emptiness of the Senate Arena; it came as the Force and the podium's controls ripped delegation pods free of the curving walls and made of them hammers, battering rams, catapult stones crashing and crushing against each other in a rolling thunder-roar that echoed the Senate's cheers for the galaxy's new Emperor.

Source: Revenge of the Sith

Sidious activates a series of sirens by telekinetically tripping a switch. He also telekinetically levitates his pod to the base of the Podium tower:

He flicked a finger, and in the Chancellor's Podium a dozen meters away, a switch tripped and sirens sounded throughout the enormous building; another surge of the Force sent his pod streaking in a downward spiral to the holding office at the base of the Podium tower.

Source: Revenge of the Sith

Sidious deflects a number of objects that Vader hurls around his operation room in anger:

VADER SCREAMS, breaks his bonds to the table, and steps forward, waving his hands, causing objects to fly around the room. SIDIOUS deflects the objects, but some of the DROIDS aren't so lucky. VADER'S PAINFUL SCREAMS echo throughout the Center.

Source: http://www.imsdb.com/scripts/Star-Wars-Revenge-of-the-Sith.html

Telepathy/Empathy

Telepathy is the ability to manipulate or communicate thoughts and mental impulses. Empathy is similar but relates to emotions rather than mental thoughts.

Canon: Dooku reveals that Sidious is influencing the minds of hundreds of Senators:

"The truth," said a confident Dooku. "What if I told you that the Republic was now under the control of the Dark Lords of the Sith?"

That hit Obi-Wan as profoundly as any of the electric bolts holding him ever could. "No! That's not possible." His mind whirled, needing a denial. He alone among the living Jedi had battled a Sith Lord, and that contest had cost his beloved Master Qui-Gon his life. "The Jedi would be aware of it."

"The dark side of the Force has clouded their vision, my friend," Dooku calmly explained. "Hundreds of Senators are now under the influence of a Sith Lord called Darth Sidious."

Source: Attack of the Clones

Palpatine reads Yoda's emotions, even when the latter tries to mask them:

"Master Yoda..." He steepled his fingers. "Are you quite certain young Anakin is ready for such a task?"

"Yes," said Yoda flatly.

And that was a lie. Yoda was a master at masking his emotions, but not even he could hide them from the greatest Sith Lord ever known. He was worried...and backed into a corner.

Source: The Clone Wars: Wild Space

Shaak Ti fails to read Palpatine's mind:

The fact that Palpatine was flustered, confused, possibly frightened was obvious. But when Shaak Ti attempted to read him through the Force, she found it difficult to get a sense of what he was truly feeling.

Source: Labyrinth of Evil

Palpatine uses a Mind Trick on Grievous:

"Welcome to the general's quarters," he said while he did input at a console built into the table. Shortly the bulkhead behind the swivel chair became a hologrammic display, showing the battle of Coruscant. The flick of a final switch summoned a stalked, eyeball-shaped holocam from the tabletop. "You're about to make an unscheduled appearance on the HoloNet, Chancellor," Grievous said. "I apologize for not providing a mirror, hairbrush, and cosmetics, so that you might at least camouflage some of your fear."

Palpatine's voice was sinister when he spoke. "You can display me, but I won't speak."

Grievous nodded at what seemed an obvious statement. "I'll display you, but you won't speak. Is that understood?"

"You will do all the talking."

"That's correct. I will do all the talking."

"Very good."

For no apparent reason, Grievous felt uncertain. "Lord Tyranus will soon be here to take charge of you."

Palpatine smiled without showing his teeth. "Then I am assured of being greatly entertained."

Source: Labyrinth of Evil

Palpatine senses Anakin's anguish and the determination of Mace Windu, Agen Kolar, Saesee Tiin and Kit Fisto:

In the night, the shadow felt the boy's anguish, and it was good. The shadow felt the grim determination of four Jedi Masters approaching by air. This, too, was good.

Source: Revenge of the Sith

Sidious utilizes a dark side confusion haze to enable him to slay Agen Kolar, Saesee Tiin and Kit Fisto:

When Mace Windu led a team of Jedi Masters to apprehend Darth Sidious, none of them expected to face the power of the Sith Lord. His innocent appearance as Chancellor Palpatine, along with an application of a concentrated dark side confusion haze, enabled Darth Sidious to take down Agen Kolar, Kit Fisto, and Saesee Tiin.

Source: Lightsabers: A Guide to the Weapons of the Force

Palpatine appears to read Anakin's thoughts:

He remembered playing a Force game with a shuura fruit, sitting across a long table from Padme in the retreat by the lake on Naboo. He remembered telling her how grumpy Obi-Wan would be to see him use the Force so casually.

Palpatine seemed to catch his thought; he gave a yellow sidelong glance as the robe settled onto his shoulders.

"You must learn to cast off the petty restraints that the Jedi have tried to place upon your power," he said. "Anakin, it's time. I need you to help me restore order to the galaxy."

Source: Revenge of the Sith

Immovability

Immovability is a Force power enabling a Force user to root themselves in a single location and make themselves immovable.

Palpatine uses the Force to cling onto slippery permacrete:

Out where the shadow's fear turned some of its Force-powered speed into a Force-powered grip on the slippery permacrete.

Source: Revenge of the Sith

Lightning

Force Lightning is the ability to unleash deadly crackles of electrical energy that cause excruciating pain and weaken life.

Canon: Darth Sidious is capable of besting even the greatest Jedi warrior through Force Lightning:

Outwardly frail, Palpatine was in truth a cunning warrior capable of besting even the greatest Jedi warrior in lightsaber combat or by conjuring powerfully destructive Force lightning.

Source: http://www.starwars.com/news/star-wars-101-servants-of-the-dark-side

Canon: Palpatine tortures Maul with Lightning, shorting out his mechanical legs:

“No,” Maul heard himself gasp. “Have mercy. Please...”

“There is no mercy,” Sidious said.

Bolts of energy ripped out from the Sith Lord’s fingers, tendrils of brilliant blue and purple that danced across Maul’s tattooed skin and ripped through his muscles, his organs. His mechanical legs convulsed, shorting out.

“You belong to me,” Sidious said. “Your existence is now perfectly meaningless.”

He stretched out his fingers and the energy tore through Maul again. Sidious watched the lightning build in intensity, his eyes unblinking, his teeth gritted in a triumphant, terrible smile.

Source: Darth Maul: Shadow Conspiracy

Canon: Sidious tortures Talzin with Lightning, exorcising her from Dooku's body:

Canon: Sidious and Talzin seem to be evenly matched in a contest of Lightning, before Dooku joins in with his own Lightning, giving Palpatine the edge:

Gallery

Sidious reduces a huge Sithspawn to ash with Lightning:

Gallery

Sidious's Lightning impacts Mace Windu's lightsaber with such force that the blade bends backwards and nearly kills Mace Windu. This is abruptly halted in order for Palpatine to lure Anakin to the dark side (by killing Mace Windu):

Lightning blasted the clouds above, and lightning blasted from Palpatine's hands, and Mace didn't have time to comprehend what Palpatine was talking about; he had time only to slip back into Vaapad and angle his blade to catch the forking arcs of pure, dazzling hatred that clawed toward him. Because Vaapad is more than a fighting style. It is a state of mind: a channel for darkness. Power passed into him and out again without touching him. And the circuit completed itself: the lightning reflected back to its source. Palpatine staggered, snarling, but the blistering energy that loured from his hands only intensified. He fed the power with his pain.

Source: Revenge of the Sith

Now Anakin was at Mace's shoulder. Palpatine still made no move to defend himself from Skywalker; instead he ramped up the lightning bursting from his hands, bending the fountain of Mace's blade back toward the Korun Master's face.

Palpatine's eyes glowed with power, casting a yellow glare that burned back the rain from around them. "He is a traitor, Anakin. Destroy him."

"You're the chosen one, Anakin," Mace said, his voice going thin with strain. This was beyond Vaapad; he had no strength left to fight against his own blade. "Take him. It's your destiny."

Source: Revenge of the Sith

Canon: Sidious kills Mace Windu with Lightning:

Mace thought blankly, Why? And moved his lightsaber toward the fallen Chancellor. Before he could follow through on his stroke, a sudden arc of blue plasma sheared through his wrist and his hand tumbled away with his lightsaber still in it and Palpatine roared back to his feet and lightning speared from the Sith Lord's hands and without his blade to catch it, the power of Palpatine's hate struck him full-on.

He had been so intent on Palpatine's shatterpoint that he'd never thought to look for Anakin's. Dark lightning blasted away his universe. He fell forever.

Source: Revenge of the Sith

Canon: The Emperor incapacitates Yoda with Lightning:

Canon: Palpatine knocks Yoda's lightsaber out of his grip with Lightning:

Canon: Sidious fires Lightning with such force that Yoda considers walking against it to be akin to walking against hurricane winds:

The Sith Lord only redoubled his attack. Hurling Force lightning, the Emperor backed away, to the very edge of the platform. Following him was like walking against hurricane winds.

Source: Revenge of the Sith Junior Novelization

Canon: Sidious scorches Yoda into a smoldering huddle of clothing and flesh:

In the Senate Arena, lightning forked from the hands of a Sith, and bent away from the gesture of a Jedi to shock Redrobes into unconsciousness. Then there were only the two of them. Their clash transcended the personal; when new lightning blazed, it was not Palpatine burning Yoda with his hate, it was the Lord of all Sith scorching the Master of all Jedi into a smoldering huddle of clothing and green flesh.

Source: Revenge of the Sith

Canon: Yoda reaches the limits of his strength trying to bend back Palpatine's Lightning. Sidious manages to leap away and blast Yoda down onto the Senate floor:

The end came with astonishing suddenness. The shadow could feel how much it cost the little green freak to bend back his lightnings into the cage of energy that enclosed them both; the creature had reached the limits of his strength. The shadow released its power for an instant, long enough only to whirl away through the air and alight upon one of the delegation pods as it flew past, and the creature leapt to follow—

Half a second too slow.

The shadow unleashed its lightning while the creature was still in the air, and the little green freak took its full power. The shock blasted him backward to crash against the podium, and he fell.

He fell a long way.

Source: Revenge of the Sith

Weather Storm

Weather Storm is a Force power enabling one to generate weather-based storms.

Sidious's mere holographic presence on Vjun causes a weather storm:

Outside, the wind picked up another notch, shrieking and groaning among the eleven chimneys as if to announce the arrival of a hideous guest. Dooku's comm console chimed. He glanced over, expecting the daily report from General Grievous, or perhaps a message from Asajj Ventress. He reached over to open the channel, ecognized the digital signature of the incoming transmission, jabbed the channel open, and snapped to his feet. "You called, my Master?"

The hologrammic projector on his desk sprang to life, and the wavering form of Darth Sidious regarded him. As always the picture was oozy and unclear, as if light itself were uneasy in the presence of the Lord of the Sith. Dark robes, purple shadows—a patch of skin, pale and mottled under his hooded cloak like a fungus growing under a rotten log. From under heavy lids the Master's eyes, snake-cold and serpent-wise, regarded him.

"What would you have of me, Master?"

"From you? Everything, of course." Darth Sidious sounded amused. "There was a time when I wasn't sure if you would be able to overcome that...independent streak of yours. After all, you were born to one of the wealthiest families in the galaxy, with gifts and abilities far, far greater than any amount of wealth could bestow. Your understanding is deep; your will, adamant. Is it any wonder you should be proud? Why, how could it be otherwise?"

Dooku said, "I have always served you well and faithfully, my Master."

"You have. But you must admit, your spirit was not made for fidelity. After all, a man who will not bow to the Jedi Council, or even Master Yoda...I wondered if perhaps loyalty was too mean, too confining a thing to ask from so great a being as yourself."

Dooku tried to smile. "The war progresses well. Our plans are on schedule. I have dealt out your deaths, your schemes, your betrayals. I have paid for your war with my time, my riches, my friends, and my honor."

"Holding nothing back?" Sidious asked lightly.

"Nothing. I swear it."

"Excellent," Darth Sidious said. "Yoda came to the Chancellor's office this morning. He is going on a very special mission. Top secret." He laughed, a harsh sound like the bark of a crow. The wind rose again, shrieking around the mansion like a creature in torment. "When he arrives, Dooku...see that you treat him."

Darth Sidious laughed. Dooku wanted to laugh along, but couldn't quite manage it before his Master cut the connection and disappeared.

***

Dooku paced his office. With the end of Sidious' call, the storm had slackened, and the shrieking wind outside now only sobbed quietly under the gables of Château Malreaux.

Source: Yoda: Dark Rendezvous

Force Corruption

Dark siders are able to spread their influence to objects and locations by twisting them in the dark side.

Sidious makes the LiMerge Building strong in the dark side:

One structure in particular--columnar in shape, round-topped, propped by angular ramparts--rising from the defiled core of The Works like a stake driven into its heart. Strong in the dark side--made so by Darth Sidious--the building had been the place of Dooku's apprenticeship, just as it had served as a training ground for Darth Maul before Dooku, and who knew who or how many other Sith disciples before Maul.

Source: Labyrinth of Evil

Midi-chlorian Manipulation

Midi-chlorian Manipulation is the power to influence and manipulate midi-chlorians.

Canon: Sidious knows everything that Darth Plagueis did, including midi-chlorian manipulation:

"Unfortunately, he taught his apprentice everything he knew, then his apprentice killed him in his sleep."

Source: Revenge of the Sith

Sidious served for many decades as the apprentice of Darth Plagueis, learning diligently at the feet of his Master. Once he possessed all of Plagueis' secrets, he retired him.

Source: Insider #88: Heritage of the Sith

Canon: Darth Sidious saves the maimed Darth Vader with the Force and medical technology:

An on Mustafar, below the red thunder of a volcano, a Sith Lord had already snatched from sand of black glass the charred torso and head of what once had been a man, and had already leapt for the cliffbank above with effortless strength, and had already roared to his clones to bring the medical capsule immediately! The Sith Lord lowered the limbless man tenderly to the cool ground above, and laid his hand across the cracked and blackened mess that once had been his brow, and he set his will upon him.

Live, Lord Vader. Live, my apprentice.

Live.

Source: Revenge of the Sith

It was a great pity, Darth Sidious thought, controlling his anger, but perhaps not irreparable. Even diminished, Darth Vader would still be very strong, and there were no Jedi left to challenge him. Darth Sidious had seen to that himself. So he kept walking until he could bend over the body. And to his surprise, his apprentice was still alive.

Relief swept his doubts away. “Get a medical capsule immediately,” Darth Sidious commanded, and clones ran off to do his bidding. Leaning down, he placed a hand on Darth Vader’s forehead, using the dark side to keep him alive.

Source: Revenge of the Sith Junior Novelization

Sidious recalled the desperate return trip to Coruscant; recalled using all his powers, and all the potions and devices contained in his medkit, to minister to Anakin's hopelessly blistered body and truncated limbs. He recalled thinking: What if Anakin should die?

How many years would he have had to search for an apprentice even half as powerful in the Force, let alone one created by the Force itself to restore balance, by allowing the dark side to percolate fully to the surface after a millennium of being stifled?

None would be found.

Sidious would have had to discover a way to compel midi-chlorians to do his bidding, and bring into being one as powerful as Anakin. As it was, Sidious and a host of medical droids had merely restored Anakin to life, which—while no small feat—was a far cry from returning someone from death.

Source: Dark Lord: The Rise of Darth Vader

Sith Sorcery

Sith Sorcery is a Force-oriented practice that involves a wide spectrum of arcane and esoteric powers.

Sidious conducts rituals, increasing Anakin Skywalker's hunger for power, but also causing ripples in the Force and unnerving Jedi across the galaxy:

During the Clone Wars, Palpatine conducted Sith rituals on Coruscant that radiated unnerving ripples in the Force, which caused anxiety among most Jedi throughout the galaxy, but also served to increase Anakin Skywalker's hunger for power.

Source: The Ultimate Visual Guide: Updated and Expanded

Sidious utilizes arcane Sith healing techniques as part of Vader's lifesaving transformation into a cybernetic suit:

Vader's lifesaving transformation is a complicated procedure that incorporates advanced technology with arcane Sith healing techniques.

Source: The Ultimate Visual Guide: Updated and Expanded

Sidious conducts an alchemical and sorcerous ritual where he consumes a creature and forms a crystal out of dark energies. He then proceeds to invoke Sith spirits and cause lightning storms across Coruscant, and causes fear and aggression in the minds of Jedi. A huge Sithspawn emerges from the crystal and devours Palpatine. He then kills it with Lightning and is transformed into his public image of Palpatine:

Gallery

Canon: Sidious utilizes a ritual of Sith Sorcery (with Dooku) to trap Yoda's mind in a illusion:

https://www.youtube.com/watch?v=yxiXU6xXxoI

Sith Alchemy

Sith Alchemy is a Force-oriented practice allowing one to alter physical features of himself or other living beings.

Canon: Palpatine uses Sith Alchemy to mask his true face behind an image more suitable for the public:

As often as Plagueis maintained that the Rule of Two had ended with their partnership, the Muun remained the powerful one, and Palpatine the covetous one. Bane’s dictum notwithstanding, denial was still a key factor in Sith training; a key factor in being “broken,” as Plagueis put it—of being shaped by the dark side of the Force. Cruelly, at times, and painfully. But Palpatine was grateful, for the Force had slowly groomed him into a being of dark power and granted him a secret identity, as well. The life he had been leading—as the noble head of House Palpatine, legislator, and most recently ambassador-at-large—was nothing more than the trappings of an alter ego; his wealth, a subterfuge; his handsome face, a mask. In the realm of the Force his thoughts ordered reality, and his dreams prepared the galaxy for monumental change. He was a manifestation of dark purpose, helping to advance the Sith Grand Plan and gradually gaining power over himself so that he might one day—in the words of his Master—be able to gain control over another, then a group of others, then an order, a world, a species, the Republic itself.

Source: Darth Plagueis

In the clean blue light of his blade he stared into the face of a man whose features were as familiar to him as his own, but now seemed as alien as an extragalactic comet—because now he finally understood that those familiar features were only a mask.

He had never seen this man's real face.

...

"And so the mask becomes the man," he sighed with a hint of philosophical melancholy. "I shall miss the face of Palpatine, I think; but for our purpose, the face of Sidious will serve. Yes, it will serve."

Source: Revenge of the Sith

"Always two there are"—not only master and apprentice, but persona and true face. Unmasked by deflected lightning during his duel with Mace Windu, the Sith Lord's true face is revealed to the world.

Source: The Complete Visual Dictionary

Sidious conducts an alchemical and sorcerous ritual where he consumes a creature and forms a crystal out of dark energies. He then proceeds to invoke Sith spirits and cause lightning storms across Coruscant, and causes fear and aggression in the minds of Jedi. A huge Sithspawn emerges from the crystal and devours Palpatine. He then kills it with Lightning and is transformed into his public image of Palpatine:

Gallery

Sidious fashions Vader's right glove around Lord Skere Kaan's Sith amulet:

Much to SPIN’s surprise, the mythical glove of Darth Vader found its way into the Prophet Kadann’s recent prophecies. The supposed mystic proclaimed that only the one who obtained the enchanted gauntlet would rule the Empire. What neither the public, nor SPIN, could know was that Vader’s right glove was fashioned around an indestructible Sith amulet of unimaginable power once belonging to Lord Skere Kaan during the New Sith Wars.

Source: The Star Wars Spy Game: SPIN Declassified

Essence Transfer

Essence Transfer is a Force power enabling one to manipulate his essence or those of others, and transfer it into another body.

Sidious can channel Sith spirits:

Chancellor Palpatine spent many years studying ancient Holocrons to learn the secrets of the Sith. The Holocrons enabled him to channel Sith spirits, who taught him how to harness dark-side energy and release lethal bolts of lightning.

Source: The Ultimate Visual Guide: Updated and Expanded

Concealment

Force Concealment allows one to mask their presence or alignment in the Force.

Sidious can move among the Jedi undetected with ease:

Palpatine nudged gently for a reaction. "A suitable job for a Jedi. Nothing can be hidden from you for long, after all."

Except me, of course.

Even now, after all these years of delicately careful planning, he had moments when the ease with which he moved undetected among them as a Sith Lord made him pause and marvel.

You don't deserve to be the guardians of the galaxy, do you?

Source: The Clone Wars

Sidious's skills with Concealment allow him to blind the Jedi's senses. He frustrates the ability of Yoda to see through the Force:

Today was not one of those days. Today the current was interrupted by eddies and whirlpools, hydraulic traps whose roar overpowered the voices Yoda sought to hear. Today the current was not pellucid, but muddied by red soil eroded from distant shores, treacherous with obstacles, tainted. Though he was scarcely aware of it, his eyelids were squeezed tight, his eyeballs dancing beneath as if incapable of focusing on any one thing. He had an image of himself drawing aside a veil only to find another, and another beyond that. The dark side frustrated his every effort to see clearly. The experiences was still something new to him.

Source: Labyrinth of Evil

Canon: Sidious is so skilled with Concealment that he is powerful enough to hide in plain sight and remain hidden from the Jedi despite Dooku revealing his existence to the Jedi:

For that reason he understood just how dangerous this new Sith Lord was. He hadn't had a sense of that danger until he had fought Dooku on Geonosis. Then he understood. In self-exile for a thousand years, the Sith had not merely been waiting for an appropriate time to reemerge and exact revenge, but for the birth of one strong enough to embrace the dark side fully and become its dedicated instrument.

This was Sidious: powerful enough to hide in plain sight. Powerful enough to instruct his apprentice, Dooku, to expose him, and still remain hidden from the Jedi. And as arrogant as the Jedi. Convinced that his way was the one and only way.

Source: Labyrinth of Evil

Palpatine held regular meetings with Yoda, Mace Windu, and other top-ranking Jedi, and even the greatest Jedi Masters failed to see the evil Sith Lord lurking beneath the good-natured politician.

Source: Databank: Palpatine

Combat Skill

Sidious is a master of all forms of lightsaber combat:

Sidious can appear frail and slow, but the Sith Lord should not be underestimated - he is a master of all forms of lightsaber combat.

Source: The Clone Wars Episode Guide

Canon: The Emperor is a master of all weapons and styles:

"Sidious is a master of every weapon and every style."

Source: www.theforce.net/episode3/jtf/palpatine.asp

Canon: Darth Sidious is capable of proficiently wielding a lightsaber in either hand:

"Pertaining to whether Sidious is right-handed or left-handed with a lightsaber, he's ambidextrous. He's just that good."

Source: http://www.theforce.net/episode3/jtf/palpatine.asp

Canon: Sidious' fighting abilities are beyond anything experienced in the Star Wars films:

"Sidious' abilities are beyond anything we've experienced."

Source: http://www.theforce.net/episode3/jtf/palpatine.asp

Canon: Sidious' fighting style constantly changes, and it is said to be impossible to get the better of him:

"It took a really long time for Nick (Gillard) to work out Sidious' fighting style, and he has a style that's constantly changing. His style is one in which you'll never get the better of him. It is ambiguous --- he'll fight less than you and draw you in; you're a sucker if you think you're going to better him."

Source: http://www.theforce.net/episode3/jtf/palpatine.asp

Canon: Sidious has a unique, shrouded fighting style, and is deadly dangerous. The dark side affords the Emperor an additional advantage, so that in a sense, he is even better than Yoda:

Grievous wasn't the only villain given his own unique lightsaber method. For Episode III Gillard also was tasked with designing an impressive style for a character fans saw fight only briefly (via Force lightning) in Return of the Jedi -- the Emperor.

"He's better than Yoda in a way because he has the extra power of the dark side," Gillard explains. "His character is so shrouded that his fighting style should be shrouded as well. The Emperor is deadly dangerous."

Source: http://archive.li/hFbAz

Canon: Darth Sidious is capable of besting even the greatest Jedi warrior in lightsaber combat:

Outwardly frail, Palpatine was in truth a cunning warrior capable of besting even the greatest Jedi warrior in lightsaber combat or by conjuring powerfully destructive Force lightning.

Source: www.starwars.com/news/star-wars-101-servants-of-the-dark-side

Canon: With respects to lightsaber fighting, Sidious is a level nine (the highest level), putting him on the same level as Yoda. Duelists such as Anakin Skywalker and Mace Windu are typically level 8 (9 only under specific circumstances) whilst other duelists such as Count Dooku, Darth Maul and Obi-Wan Kenobi are level 8. The likes of Kit Fisto are level 7, where most expert swordmasters lie. The difference between each level is enormous:

Level nine, the highest level of lightsaber fighting, is occupied by a small number of capable sword masters, including Yoda and Darth Sidious. At so high a ranking, it comes down to individual fighting styles as well as the circumstances of the surroundings that make a difference.

Source: http://www.theforce.net/episode3/jtf/palpatine.asp

In the Jedi levels of lightsaber fighting, Obi-Wan is an eight, while Anakin, Yoda and Darth Sidious are nines.

Source: http://www.theforce.net/episode3/jtf/palpatine.asp

"The level is not necessarily an indication of the performer's talent, but it takes a truly gifted and physically skilled actor to play a powerful Jedi combatant. 'Hayden Christensen is one of the best there is,' says Gillard. 'I've seen hundreds of sword fighters, people who do it for a living, and he leaves them all in his wake. His style has changed a bit since Episode II, when he was only a level seven. On this he's a level nine.' For the curious, Gillard does not reveal any Jedi who has achieved level ten. The highest is nine, occupied by a small number of capable sword masters, including Yoda and Darth Sidious. At so high a ranking, it comes down to individual fighting styles as well as the circumstances of the surroundings that make a difference."

Source:http://web.archive.org/web/20051202222123/http://starwars.com/episode-iii/bts/production/beacon126.html

"When I started, I figured that a youngling is a level one. And somebody like Kit Fisto - seven. I did take it to eight and nine, but not many people know that. Eight and nine is cheat. So Obi-Wan is eight. Yoda is nine. Mace is eight, bordering on nine. Anakin is nine."

Source: https://youtu.be/Z2-iZNQrFBA?t=908

"Yes, but it's like a Richter scale - an earthquake - and so the difference between seven and eight and eight and nine is enormous."

Source: https://youtu.be/Z2-iZNQrFBA?t=946

"Dooku & Maul are 8, but there is a huge difference inside the numbers themselves. It's not about how well they fight, it's about how well they learned."

Source: https://i37.servimg.com/u/f37/17/73/92/12/ng10.png

Canon: Palpatine duels both Maul and Savage Opress, always holding the upper hand in the fight whilst toying with them. Barely tested by the duo, Sidious kills Savage and then easily defeats an enraged Maul — he is only strained to overpower Maul in a bladelock:

http://www.youtube.com/watch?v=-7hBZNsPnyg

Meanwhile, Sidious duels the Sith brothers, never wavering from his position of superiority.

Source: http://www.starwars.com/tv-shows/clone-wars/the-lawless-episode-gallery

Upon arrival, Sidious declared the Sith brothers to be his rivals. In an intense duel, he killed Savage and toyed with Maul, ultimately deciding not to kill his former apprentice.

Source: http://www.starwars.com/databank/darth-maul-biography-gallery

This is reinforced by several comments from Dave Filoni, who claims that Sidious is the strongest and most dangerous character in TCW and was enjoying himself against Maul:

Well, that was definitely one of our biggest challenges, Maul and Savage versus Sidious, because we wanted to have an epic lightsaber fight. We hadn’t really had a big one in awhile, and I really thought this is our chance to show everyone why Sidious is the Sith Lord. Why no one can compete with this guy.

Source: http://www.starwars.com/news/interview-dave-filoni-on-star-wars-the-clone-wars-season-five-part-2

At the end of the day, with Sidious, nobody was really going to be able to touch him. He had to be the strongest, most dangerous guy. And you could see at a certain point, he just puts his lightsabers away at the end of the fight and says, “I’m done with this,” and goes in and mauls Maul, so to speak. I love the part where Maul begs at the end, because that’s the thing about Sith. At the end of the day, if you break them…

Source: http://www.starwars.com/news/interview-dave-filoni-on-star-wars-the-clone-wars-season-five-part-2

It’s nice to see the villain of Star Wars really kick the butt of other villains you think are powerful, which helps establish Sidious as “Oh, yeah. This is why he is the Sith Lord.”

Yeah, I think that’s pretty literal at that point. I think that what you understand about Maul is that he is still not nearly as powerful as Sidious.

Source: http://www.ign.com/articles/2013/02/05/star-wars-the-clone-wars-dave-filoni-talks-about-the-death-watchdarth-maul-arc-and-the-casualties-along-the-way?page=2

IGN: He really always does have the upper hand in that fight.

Filoni: And he's enjoying himself while he does it.

Source: http://www.ign.com/articles/2013/02/05/star-wars-the-clone-wars-dave-filoni-talks-about-the-death-watchdarth-maul-arc-and-the-casualties-along-the-way?page=2

Canon: Sidious casually disarms Talzin in Dooku's body, declaring that she does not possess the skill of the Count:

Canon: After blitzing Agen Kolar and Saesee Tiin, Sidious outduels Kit Fisto even with Mace Windu's aid, and then proceeds to duel an enormously amped Mace Windu to a standstill until he presents Windu with a false Shatterpoint with which to end the duel:

https://www.youtube.com/watch?v=4ESOrF_u1hg

Green fans, sheets of purple—

And crimson flame. He was too late. The green fire faded and winked out; now the lightning was only purple and red.

...

Sinking into Vaapad, Mace Windu fought for his life. More than his life: each whirl of blade and whipcrack of lightning was a strike in defense of democracy, of justice and peace, of the rights of ordinary beings to live their own lives in their own ways. He was fighting for the Republic that he loved.

Vaapad, the seventh form of lightsaber combat, takes its name from a notoriously dangerous predator native to the moons of Sarapin: a vaapad attacks its prey with whipping strikes of its blindingly fast tentacles. Most have at least seven. It is not uncommon for them to have as many as twelve; the largest ever killed had twenty-three. With a vaapad, one never knew how many tentacles it had until it was dead: they move too fast to count. Almost too fast to see. So did Mace's blade.

Vaapad is as aggressive and powerful as its namesake, but its power comes at great risk: immersion in Vaapad opens the gates that restrain one's inner darkness. To use Vaapad, a Jedi must allow himself to enjoy the fight; he must give himself over to the thrill of battle. The rush of winning. Vaapad is a path that leads through the penumbra of the dark side. Mace Windu created this style, and he was its only living master. This was Vaapad's ultimate test.

Anakin blinked and rubbed his eyes again. Maybe he was still a bit flash-blind—the Korun Master seemed to be fading in and out of existence, half swallowed by a thickening black haze in which danced a meter-long bar of sunfire. Mace pressed back the darkness with a relentless straight-ahead march; his own blade, that distinctive amethyst blaze that had been the final sight of so many evil beings across the galaxy, made a haze of its own: an oblate sphere of purple fire within which there seemed to be dozens of swords slashing in all directions at once.

The shadow he fought, that blur of speed—could that be Palpatine?

Their blades flared and flashed, crashing together with bursts of fire, weaving nets of killing energy in exchanges so fast that Anakin could not truly see them—but he could feel them in the Force. The Force itself roiled and burst and crashed around them, boiling with power and lightspeed ricochets of lethal intent. And it was darkening.

Anakin could feel how the Force fed upon the shadow's murderous exaltation; he could feel fury spray into the Force though some poisonous abscess had crested in both their hearts. There was no Jedi restraint here. Mace Windu was cutting loose.

Mace was deep in it now: submerged in Vaapad, swallowed by it, he no longer truly existed as an independent being. Vaapad is a channel for darkness, and that darkness flowed both ways. He accepted the furious speed of the Sith Lord, drew the shadow's rage and power into his inmost center—

And let it fountain out again. He reflected the fury upon its source as a lightsaber redirects a blaster bolt.

There was a time when Mace Windu had feared the power of the dark; there was a time when he had feared the darkness in himself. But the Clone Wars had given him a gift of understanding: on a world called Haruun Kal, he had faced his darkness and had learned that the power of darkness is not to be feared. He had learned that it is fear that gives the darkness power. He was not afraid. The darkness had no power over him. But—

Neither did he have power over it.

Vaapad made him an open channel, half of a superconducting loop completed by the shadow; they became a standing wave of battle that expanded into every cubic centimeter of the Chancellor's office. There was no scrap of carpet nor shred of chair that might not at any second disintegrate in flares of red or purple; lampstands became brief shields, sliced into segments that whirled through the air; couches became terrain to be climbed for advantage or overleapt in retreat. But there was still only the cycle of power, the endless loop, no wound taken on either side, not even the possibility of fatigue.

Impasse.

Which might have gone on forever, if Vaapad were Mace's only gift. The fighting was effortless for him now; he let his body handle it without the intervention of his mind. While his blade spun and crackled, while his feet slid and his weight shifted and his shoulders turned in precise curves of their own direction, his mind slid along the circuit of dark power, tracing it back to its limitless source. Feeling for its shatterpoint. He found a knot of fault lines in the shadow's future; he chose the largest fracture and followed it back to the here and the now—

And it led him, astonishingly, to a man standing frozen in the slashed-open doorway. Mace had no need to look; the presence in the Force was familiar, and was as uplifting as sunlight breaking through a thunderhead. The chosen one was here.

Mace disengaged from the shadow's blade and leapt for the window; he slashed away the transparisteel with a single flourish. His instant's distraction cost him: a dark surge of the Force nearly blew him right out of the gap he had just cut. Only a desperate Force-push of his own altered his path enough that he slammed into a stanchion instead of plunging half a kilometer from the ledge outside. He bounced off and the Force cleared his head and once again he gave himself to Vaapad.

He could feel the end of this battle approaching, and so could the blur of Sith he faced; in the Force, the shadow had become a pulsar of fear. Easily, almost effortlessly, he turned the shadow's fear into a weapon: he angled the battle to bring them both out onto the window ledge. Out in the wind. Out with the lightning. Out on a rain-slicked ledge above a half-kilometer drop. Out where the shadow's fear made it hesitate. Out where the shadow's fear turned some of its Force-powered speed into a Force-powered grip on the slippery permacrete. Out where Mace could flick his blade in one precise arc and slash the shadow's lightsaber in half.

One piece flipped back in through the cut-open window. The other tumbled from opening fingers, bounced on the ledge, and fell through the rain toward the distant alleys below. Now the shadow was only Palpatine: old and shrunken, thinning hair bleached white by time and care, face lined with exhaustion.

Source: Revenge of the Sith

Here - in a lavish Senatorial office atop one of the tallest buildings on Coruscant - the endgame of the conflict between Sith and Jedi begins. Revealed as a Dark Lord of the Sith - Chancellor Palpatine vaults across his desk with the uncanny speed of a master in the Force - his lightsaber blazing to life. Its blade carries the swift death of no less than three Jedi. Even the great Mace Windu will be fought to a standstill in this - the first battle in a conflict that will end with the extermination of the Jedi.

Source: Jedi vs. Darth Sidious 5-Pack (The Saga Collection, 2006)

A powerful Jedi warrior - Mace Windu has mastered skills that only the most trained minds could hope to attempt. He is slain in a desperate act of betrayal by Anakin Skywalker after fighting Chancellor Palpatine to a standstill in a battle that costs the lives of three Jedi.

Source: Mace Windu (Revenge Of The Sith - The 30th Anniversary Collection, 2007)

Canon: Sidious duels Yoda to a standstill and wins the battle through the Force:

https://www.youtube.com/watch?v=9DI8kkR9G0Q

Wheless' team worked out three key poses to tell the story:

1) Yoda and Darth Sidious lock lightsabers

2) Yoda is forced back by Sidious' power, and grimaces in pain

3) Yoda uses all of his strength to push Sidious back

....

"The shot is only three seconds long, but it communicates to the audience that Yoda has met his match," he says.

Source: Insider #86: Yoda's Right Arm

Inside the spacious interior of the Galactic Senate chamber, Yoda challenged the Emperor. The two engaged in a spectacular duel—a contest between the most powerful practitioners of the Force’s Light and Dark Sides. The Emperor proved too powerful to defeat. Although Yoda held his own for much of the duel, in the end the Sith bested him. He realized that continuing to directly confront Palpatine would mean failure. Defeated, Yoda slunk away into the shadow's of the Senate chamber's cavernous depths, leaping into a waiting getaway speeder piloted by Bail Organa.

Source: The Complete Star Wars Encyclopedia

Yoda went after Palpatine in the empty Senate chamber, but could not defeat the most powerful Sith Lord in history.

Source: The New Essential Chronology

His true criminal colors revealed after Order 66 wipes out the Jedi Order on a galactic scale, Chancellor Palpatine accepts the title of Darth Sidious and all that goes with it. Reveling in his power, he is challenged by a feisty Yoda in the empty Coruscant Senate chamber. It’s a furious, unprecedented battle royale, with both adversaries hurling and dodging chamber pods. Ultimately, an overmatched Yoda flees to fight another day.

Source: Star Wars Trading Card Game

Though Yoda is a tough combatant, the Emperor uses his Sith powers to release lightning bolts and hurl floating platforms at his foe. Ultimately the battle proves too much for Yoda, who barely escapes and is whisked away to safety by Senator Bail Organa.

Source: Ultimate Star Wars

Yoda confronted Sidious in the heart of the Senate chambers. This erupted into an intense duel between these masters of the Force, a fight that Yoda ultimately lost and was forced to flee.

Source: Databank: Yoda

Master Yoda made a last-ditch attempt to stop him, and their fight spilled over into the now-empty Senate rotunda. Darth Sidious overwhelmed Master Yoda with the destructive energy of the dark side, and the Jedi Master fled Coruscant.

Source: Databank: Darth Sidious

Yoda is eventually outmatched by Sidious.

Source: Databank: Star Wars: Revenge of the Sith Story Gallery

The Jedi Master and the Sith Lord dueled in the Senate chamber, but Sidious was too strong for Yoda to defeat.

Source: Databank: Coruscant History Gallery

A fierce duel commenced. Yoda and Darth Sidious each used his side of the Force to try to defeat the other. But the Sith Lord's powers were too strong.

Source: Revenge of the Sith Canon Junior Novelization

Gallery