Then, he finds and takes a mutant by the name of Franklin Richards to use his powers to change reality. Realizing that the Sentinels could store psionic energy, it created an army of these mutant-hunting robots. Onslaught was an entity created from the minds of Professor X and Magneto. Capcom: Clash of Super Heroes, where it served as the game's final boss.
Onslaught made its fighting game debut in Marvel vs. Onslaught is a character from Marvel Comics' X-Men series, first appearing as a cameo in issue #15 of X-Man before making a full appearance in issue #53 of X-Men Vol.