Death Jr. Pause the game, hold L + R, and enter the following codes: Up, Up, Down, Down, Left, Left, Right, Right, Square, Triangle Invincibility Triangle, Triangle, X, X, Square, Circle, Square, Circle, Right, Down Unlimited Ammo Up, Up, Down, Down, Left, Right, Left, Right, X, O All Weapons and Weapon Upgrades Triangle, Triangle, X, X, Square, Circle, Square, Circle, Down, Right Refill Ammo