Mankind to unlock Dude Love and Cactus Jack
Shamrock for no wimps mode. (That means no blocking)
Shawn Micheals to create female wrestlers
Undertaker to have no lifebars.
Ahmed for ego mode. (you get big and smal heads)
Owen Hart for Sue the ring girl
P.S. If you want to look at your cheats press L1, R1 and L1 at the main menu screen.