Black Suit Spider-man And U.S. Agent Captain America
Okay so. First from the main menu of the game select settings then cheats then to unlock black suit spider-man enter spider-man, captain america, abomination, mystique, and spider-man. Now for U. S . Agent captain america enter abomination, iron man, dr. Doom, abomination, and magneto. Then go to back to the main menu then go to battle then hit single player. It should have a star on C/A and S/M select the small box on the inside of C/A or S/M then their you go!
Select cheats from settings and enter wolverine, wolverine, dr doom, abonation, wolverine. This will make you be able to kill everyone hitting them one time only (will also work for boxes).