I think I already saw this somewhere...

New boss: Mr. Negative

Escape from Dark Dimension - Power Rangers It's Morphin Time

New boss: Exodus

Beast and Iceman Fight Spider-Man Villain Trapster

X-Men Team Up: Colossus and Iceman CPU Co-OP against Anaconda

Avengers vs Sonic the Hedgehog?

Sprite base: Big Putty

Guess the character!

Guess the character