Channel Five - Enter 67GDZ[Music Note]JGK[Triangle] as a password.
Full Energy - Press Start to pause game play. Then, press UD + A + B + Start.
Exit Level - Press Start to pause game play. Then, press A three times.
Six Lives - Hold Down + A + B and press Start twice.
Change Weapon In-Game - During gameplay, pause the game and press A 3 times, then choose S on the select screen.
Drop to 0 lives and half a heart - Pause the game and hold A+B+DU+Start, then unpause.
Final Level - M + DU + P + H + DU + R + D + M + DU + P