Marvel vs Capcom
Starting with X-Men: Children of the Atom, Marvel entered Capcom's fighting game arena. It was only a matter of time before the two went head to head.
This list compiles all Marvel and Capcom characters who made appearances since the first Marvel fighting game. The only character not included in the list is Abyss, as he does not have comic appearances/pages on Comic Vine. Assist characters from Marvel vs Capcom not included.
Wolverine is the only character to appear in all Capcom fighting games with Marvel characters. I know. Shocking.
COTA - X-Men: Children of the Atom
MSH - Marvel Super Heroes
XvSF - X-Men vs Street Fighter
MSHvSF - Marvel Super Heroes vs Street Fighter
MvC - Marvel vs Capcom: Clash of the Super Heroes
MvC2 - Marvel vs Capcom 2: New Age of Heroes
MvC3 - Marvel vs Capcom 3: Fate of Two Worlds
UMvC3 - Ultimate Marvel vs Capcom 3