Display credits:
Pause the game, hold R and press C, Left, Up, Right, Left, Right, Down(2).

Unlock stages:
Press Start at the map screen. Hold R and press Start, Right(2), Down, Right, Up, L, A, Left(2). All televisions on the current map will be enabled.

Ninety-nine lives:
Pause the game, hold R and press Up(2), Down, Right , A, Down.

Fireball power-up:
Pause the game, hold R and press C, Up, Right(2), Y, B, Up, Right, Up.

Ice power-up:
Pause the game, hold R and press Right, Y, Right, Down, Right(2), B, Left, Up, Right.

Lightning power-up:
Pause the game, hold R and press Down, Up, Start, Right(2), Z, A, Start(2), Right(2).

Speed power-up:
Pause the game, hold R and press Right, X, L, Right, A, Down, Start, Right(2), Down.

Jump power-up:
Pause the game, hold R and press Down, Up, Start, Right(2), Down, L, Right, Start.

Invincibility:
Pause the game, hold R and press B, A, Down, A, Down(3), Up, Down, Right.

In-game reset:
Pause game play and press A + B + L + R + X + Y + Z.

Hint: Defeating the Toonville Boss:
Crawl on top of the ceiling. When he is below you, hit the anvil and it will fall on him.

Level	Password
Cemetery 3	TXZFKHGP
Cemetery 4	TXZFKHGP
New Toon Land 1	CYRFYHGP
New Toon Land 3	BYTCYHGP
New Toon Land 5	CXGCSHKP
Jungle Isle 1	DXHCSHKP
Jungle Isle 2	TXKLPHKP
Kung Fuville 1	DXBLPHKP
Rezopolis 1	HZVYRHKP
Rezopolis 3	CZYDRHYP