Wolverine

Wolverine is the most recognizable character from Marvel's X-Men. He is a mutant, born with superhuman senses and an incredible healing factor, in addition to six razor-sharp claws made of bone that protrude from between three knuckles on each hand. Enlisted by the Canadian government to be part of the Weapon X program, Wolverine's skeleton and claws were laced with the unbreakable metal known as Adamantium, making Wolverine nigh-invulnerable.

2D Fighters
Wolverine defeated Baraka in the opening round of the inaugural Heir to the Throne tournament, but was eliminated by Dan Hibiki in round 2.

Earth's Mightiest
Wolvie was eliminated by Steve Rogers in his first match.

3D Fighters
In round one, Logan defeated Superman and Ellis in round two, before being defeated by Shao Kahn in the third round.

WTF
Wolverine and Tizoc tied, eliminating both competitors.

Children of the Atom
Wolverine was an alternate who entered in the 2nd round, but then tied with Rogue, eliminating them both from the tournament.