This is the first time Capcom's characters from the Street Fighter series crossed over and featured characters from the X-Men or any Marvel Comics franchise.

The tag team system was omitted from the PlayStation version due to memory limitations.

The character sprites in this game are reused from X-Men: Children of the Atom (1994) and Street Fighter Alpha 2 (1996). The only characters that are new sprites are the X-Men characters: Rogue, Gambit, and Sabertooth and the reason for that is because they did not appear in any prior Capcom fighting game.