Cheat mode:
REMEMBER: This code requires a six-button controller. Hold A + Y + Z at the title screen to display the cheat screen.

Black Ball Assault mini-game:
Submit the code AZY at the cheat screen. Then, highlight "End" and press A or C. Black Ball Assault is a Pong-like mini-game.

Invincibility:
Submit the code MTK at the cheat screen. Then, highlight "End" and press A or C.