Looking for more variety in your multiplayer battles? Go to the game selection screen (where you choose between adventure mode,
battle mode, etc.). If you have a controller with a pause button press it, or
just press the start button quickly and repeatedly until you hear a chime. You need to tap it quickly, as if you were playing a track-and-field game.
Now go into battle mode and the four extra battle levels (In the Gutter, Sea Sick, Blizzard Battle, Lost at Sea) will be enabled. We have tested this code with BOTH the US and Japanese version and we assure you it works.