All wrestlers:
Press Up(2), Down(2), Left, Right, Left, Right, Triangle(2), Square at the main menu. After enabling the code, go to the options screen and save your options. This will keep all wrestlers unlocked if you start your game over.
Neil Falloni, Ross Oliveira,and LaDiEzMaN31601.

OUR RATING FOR THIS GAME: 

(5 is best)