Unlimited Shields
     At the Cheats menu, enter Triangle, Triangle, Square, Square, Square.

Unlock Animal Ships
     At the Cheats menu, enter Triangle, Circle, Circle, Triangle, X.

Unlock Retro Ships
     At the Cheats menu, enter X, Circle, Triangle, Square, X.

Unlock All Features
     At the Cheats menu, enter X, Triangle, Circle, Triangle, Circle.

Unlimited Ammo
     At the Cheats menu, enter Triangle, Circle, X, Circle, Square.