Extra health and speed
At the title screen, press Down(2), Up, Down, Left, Right, Down, Up(4), Right, Left, Square. Note: This code only works in versus and team fighter modes.

Large characters at world map
At the title screen, press Left, Square, Up, Circle, Right, Triangle, Down, Triangle.

Alternate versus mode characters
At the character selection screen in versus mode, press L1(2), Down(2), R2, Select, R2, Select, R1, L1, R2, R1(2), Select.

Alternate team fighter characters
At the character selection screen in team fighter mode, press L1(2), Down(2), R2, Select, R2, Select, R1, L1, R1, R2(3), Select.

Elephant Pool arena
Win twenty team battles to unlock the Elephant Pool arena in versus mode.

Metal Age arena
Win one hundred arena battles to unlock the Metal Age arena in versus mode.