Powers and abilities
Using "absorption cells" Amazo was able to duplicate the powers of any metahuman he encounters (not unlike Marvel's Super-Adaptoid). Originally, he could only use one power at a time and has duplicated Superman's strength, The Flash's speed, Green Lantern's power ring, and Wonder Woman's magic lasso among others. In most cases, Amazo possesses a 'default' form consisting of the powers of the first five (post-Crisis) JLA members, capable of adapting to incorporate other powers. After years of battling the JLA to a standstill, he recently "upgraded" by absorbing part of Hourman's Worlogog which gave him time travelling powers as well.
Powers and abilities
Ultron's abilities vary with each redesign, but typically include superhuman strength and durability, the power of flight, and various offensive weapons such as concussion blasters, radiation emitters and his "encephalo-ray", which plunges its victims into a deathlike coma. The latter ray also allows Ultron to mesmerize and outright mind-control his victims, or implant subliminal hypnotic commands within their minds to be enacted at a later time. Ultron's outer shell is usually composed of pure Adamantium, rendering it almost totally impervious to damage; even a punch from the Hulk only caused a small crack through which the Wasp could enter and disable his internal mechanisms. (Secret Wars #12) These are generally less durable, as demonstrated when Wonder Man managed to destroy Ultron by throwing him so hard that they shattered. Ultron's Adamantium forms have proven vulnerable to molecular rearrangement devices and the metal-destabilizing ore known as Savage Land Vibranium ("anti-metal"). Some Ultron models feature tractor beams and energy absorption capabilities.
Most Ultrons are powered by a small internal nuclear furnace, and incorporate a "program transmitter" which can beam part or all of Ultron's programming into remote locations such as computers or alternate robotic bodies. Ultron can often control other machines remotely even if he has not transplanted his consciousness into them. One recent Ultron model developed hive-mind technology, allowing him to animate and control hundreds of alternate Ultron bodies at the same time, becoming a robotic one-man army. Ultron is one of the foremost robotics experts on Earth.
Ultron has one sole major weakness: an internal molecular rearranger that renders the adamantium components of his internal workings more malleable, thus giving him a means to remodel or reconstruct his physical form. However, it has no effect on his outer armor, so it is virtually impossible to disable it from the inside. The chaos magic wielded by the Scarlet Witch have proven to be the sole exception thus far.
survival of the fittest! who wins?