At the main menu, hold L and press A, Y, A, Y, B to enable the "Cheats" option.
At the main menu, hold L and press A, X, Y, B, A, X, Y, B to unlock all bonuses.
Successfully complete career mode to unlock all wrestlers and FMV sequences.
Defeat Zandig, then buy his movie in the shop to unlock him as a playable character.
Keep blocking until you see them charging a block break. Then, let them hit you and it will not restart your progress.
In career mode, go to the pool area. Grab the skimmer as fast as possible and start to beat your opponent senseless. Never put it down and just keep smacking them. Eventually the match will be over and you will get about $40 per match on average. Repeat this process for a nice profit.