Origin

Alex, Julie, Jack, and Katie met Aelfyre "Whitey" Whitemane, a member of the Kymellian race resembling humanoid horses, who came to stop there father from using his new invention an antimatter generator that siphoned energy from an alternate dimension, knowing it had the potential to wipe out entire planets. Their rival species, the Snarks, attempted to steal it. Whiteman suffered fatal injuries in the following battle, but before dying he bestowed one of each of his abilities to the four power children. They became the super heroic Power Pack, and took on the identities of Alex, "Gee", the power to control the effect gravity had on him and whoever/whatever he was touching, Julie, "Lightspeed," was given the power of flight at speeds equal to that of light (with a rainbow trail), Jack, "Mass Master," could dissipate into a large cloud-like form or compress himself into a "Barbie-doll" size while retaining his original weight, and Katie, "Energizer," could absorb molecules with a touch and convert them into pure energy making her glow brightly and able to shoot energy balls from her body.

Their mission began as a rescue mission to save their parents, Dr. James and Margaret Power, from the Snarks. An evil Reptilian race of aliens who were the mortal enemies of the Kymellian. Hiding there duel identities from there parents, the Power Pack dealt with alien threats and employed Whitey's intelligent spacecraft, the Smartship Friday. Power Pack aided the Morlocks during the Mutant

Massacre, and fought Apocalypse's horsemen during the Fall of the Mutants. Franklin Richard's using the name Tattletale due to his ability to perceive possible futures, became an unofficial member of the team, as did Kofi a Kymellian relative of the late whitemane.

Energy Swapping

Power Pack's powers often switched from one member to another. After one such incident, the children adopted the names of Destroyer (Alex), Molecula (Julie), Counterweight (Jack), and Starstreak (Katie). The team helped relocate the Kymellian's to a new world. Alex even appeared to transform into a Kymellian, though this was revealed to be a pseudoplasm duplicate planted by Technocrat a domineering Kymellian.

Brake Up

Alex joined the New Warriors, stealing the energies of his brother ans sisters to become Powerpax and then Powerhouse. He restored his siblings' powers when he left the New Warriors.

Power Pack is once again active, with Alex going by the name of Zero-G. the team recently fought off a squad of Snake invaders. The continue to fight for our planet.

Alternate Realities

Earth-5631

In 2005 a recreation of the characters was made. The power pack team fought against a Snark, alternate dimension squids, Alex's girl trouble and the fact that Julie didn't want to be part of the team anymore.

Off of this series came out other recreations where the pack meet up with Spider-Man, Iron Man, The Fantastic Four, The X-Men, and the Avengers.

When meeting the FF they accepted their honorary teammate Franklin Richards.

When meting Spider-Man they have to help Peter grow up after he gets grown down.

When meeting the Avengers Jack bumps into a cool armor made out of iron and the pack meet their future selves after an encounter with Kang the Conquerer.

In 2008 an off spin of the pack's origins was created

in Power Pack: Day One.

These stories take place in Earth-5631.

Earth-295

In the Age of Apocalypse reality the Power Pack siblings existed, but was experimented on by the Dark Beast. It is not known if they possessed any powers and they didn't survive the experiments.