Insert the following codes at the in-game cheats menu for the desired result.

All Moves - Down, Down, Left, Right, Left
All Multiplayer Characters - Left, Down, Left, Right, Down
Big Head Mode (Story Mode) - Down, Up, Left, Right, Right
Infinite Chi - Down, Right, Left, Up, Down
Invulnerability - Down, Down, Right, Up, Left
Dragon Warrior Outfit (Multiplayer Mode) - Left, Down, Right, Left, Up
All costumes - Right, Left, Down, Up, Right
4x damage multiplier - Up, Down, Up, Right, Left
Full upgrades - Left, Right, Down, Left, Up