Cheat code screen:
Select "Game Status" at the options screen, highlight any of the
characters, after press L + R. Remove all of your VMUs from the
controllers to enable the following cheat codes:
Note: You can use these codes only once.
3 enemies attack: Enter "UNDER_FIRE"
All characters available: Enter "LLA_KCOLNU"
All levels from the original Vigilante 8: Enter "OLD_LEVELS"
Big wheels: Enter "GO_MONSTER"
Disable all codes: Enter "NO_CODE"
Disable enemies in arcade mode: Enter "HOME_ALONE"
Disable wheel attachment icons: Enter "DRIVE_ONLY"
Faster cars: Enter "MORE_SPEED"
Heavier cars: Enter "GO_RAMMING"
High suspensions: Enter "JACK_IT_UP
Invincibility: Enter "ELBICNIVNI"
Lighter cars: Enter "HI_CEILING"
Moon gravity: Enter "NO_GRAVITY"
No delay when shooting: Enter "RAPID_FIRE"
Random Fast action: Enter "QUICK_PLAY"
Select same cars in multi-player: Enter "MIXED_CARS"
Slow-mo mode: Enter "GO_SLOW_MO"
Super damage missiles: Enter "BLAST_FIRE"
Unlock all ending sequences: Enter "LONG_MOVIE"
Upgrade all vehicles: Enter "LLA_DORTOH"
