Once you have unlocked the back street arena called TIMES SQUARE then it is very easy to defeat your opponent even when there is more than one opponent and I'll tell you why. When the starting of the match go the TIMES SQUARE then go up to the highest point of the level then SUPER JUMP down. The com will not be able to SUPER JUMP so instead it will fall down and do major damage to itself. keep doing this until the time when you want to pin him/her. (NOTE: this can be done in any match as long you can go to that place)