Cheat codes:

Indestructible weapons:
Press L, R, L, R, C-Left, C-Left at the main menu.

Infinite stamina:
Press R, R, B, R, R, B at the main menu.

Small wrestlers:
Press R, R, L, L, C-Left, C-Right at the main menu.

Big women wrestlers:
Press R, R, B, B, L, L at the main menu.

Rude grunts:
Press R, L, R, L, B, B at the main menu.