Universe/Timeline:
Marvel Universe
The four Power siblings accidentally became part-time super heroes when an alien named Aelfyre Whitemane crashed to Earth near their house while fleeing his enemies, the Snarks. Whitey was mortally wounded in the pursuit, and chose to pass on his Kymellian powers to the Powers as he died, making them into Power Pack.
Original written by Louise Simonson (also the writer for X-Factor and New Mutants), Power Pack was incorporated into several early X-Men events and crossovers, including the Mutant Massacre, Fall of the Mutants and, to a lesser degree, Inferno.
