Enter in Cheat Menu:

4x Damage Multiplier - Up, Down Up, Right, Left
Big Head Mode For Story Mode - Down, Up, Left, Right, Right
Dragon warrior Outfigt for Multiplayer- Left, down , right, left , Up
Infinite Chi - Down, Right, Left, Up, Down
Invulnerability - Down, Right, Left, Up, Down
Unlock all Multiplayer Characters - Left, Down, Left, Right, Down