Contra 4 Nintendo DS Cheats

Upgrade all weaponsPause the game and press Up(2), Down(2), Left, Right, Left, Right, B, A, Start to fully upgrade all your weapons. Note: This code can only be entered once per level, as repeating it will cause death. Also, you must have an upgradeable weapon to avoid the death effect. This code does not work on the Easy difficulty setting.99 livesLose a life exactly when you gain an extra life