Unlock All FMV sequences: 
     Finish career mode

Use any wrestler in career mode: 
     Finish career mode

Play as Zandig:
     Beat Zandig, Go to the shop and buy his movie.

Unlock Cheat mode:
     Hold L1 and press X, Triangle, X, Triangle, Circle on the main menu.

Unlock extras:
     Hold  L1  and  press  X,  Square,  Triangle,  Circle,  X, Square,
Triangle, Circle on the main menu.


Press X+R1+R2 and the menu for cheats will be on the srceen:

Cheat code:         Effect:
master              Unlock everything
cooldaddy           Unlimited money
halloween           Adds halloween costumes in the create wrestler menu
nopunching          Unlimited health
coooool             Unlimited turbo bar
man                 Stuff is punch, kick, throwable