CheatOgre.com: Cel Damage

Unlock Everything
Enter the character selection screen, select LOAD and enter FATHEAD or ENCHILADA! as a name to unlock all cars, tracks, and modes.

Invincibility
Enter the character selection screen, select LOAD and enter CODY as a name, and you will now be invincible.

Pen and Ink Graphics
Enter the character selection screen, select LOAD and enter PENCILS as a name to change rendering mode.

Big-Head Mode
Hold down L + R + Up (on the directional pad) for three seconds during gameplay and all characters will turn Super-Deformed (big heads, little bodies).

Unlock Ranged Weapons
Enter the character selection screen, select LOAD and enter GUNSMOKE! as a name.

Unlock Melee Weapons
Enter the character selection screen, select LOAD and enter MELEEDEATH as a name.

Unlock Hazard Weapons
Enter the character selection screen, select LOAD then enter HAZARDOUS as a name.

Unlock Personal Weapons
Enter the character selection screen, select LOAD then enter UNIQUEWPNS as a name.

Unlock Movement Power-ups
Enter the character selection screen, select LOAD then enter MOVEITNOW as a name.

Unlock All FMV
Enter the character selection screen, select LOAD then enter MULTIPLEX! as a name.

Unlock Brian The Brain
Enter the character selection screen, select LOAD then enter BRAINSALAD as a name. This characters stages will also become available.

Unlock Count Earl
Enter the character selection screen, select LOAD then enter COUNTDEAD as a name. This characters stages will also become available.

Unlock Whack Angus
Enter the character selection screen, select LOAD then enter WHACKFAD as a name. This characters stages will also become available.

Unlock T. Wrecks
Enter the character selection screen, select LOAD then enter TWRECKSPAD as a name. This characters stages will also become available