Deadpool

Wade Wilson was one of the best assassins-for-hire money could buy. But he got cancer. He joined the Weapon X project, which had recently created Wolverine, and attempted to fuse a version of Wolverine's healing factor into Wilson's body, to cure him of the cancer. The treatment worked, but it left his body horribly scarred and his mind shattered. Horrendously mentally unstable, and often found arguing with the voices in his head, Wilson now continues his work-for-hire lifestyle as the mercenary Deadpool.

Deadpool has a huge crush on the late Bea Arthur.

3D Fighters
In the first round, Deadpool defeated Jun the Swan, then Captain Marvel in the second round, and Kitana in the third round, before being eliminated by Sub-Zero in the fourth round.

Trivia

 * Deadpool was co-created by Rob Liefeld and Fabian Nicieza.
 * Deadpool aka Wade Wilson has a very similar name to Deathstroke the Terminator aka Slade Wilson.
 * Ever notice that Wilson's costume looks a lot like a '90s "X-TREME" Spider-Man redesign?