Press L and R at the same time at the Main Menu to display the code entry screen. Then enter one of the codes listed below and move up or down to choose numbers from 0-9. A monster sound will confirm correct code entry.

The following monsters are hidden in a block in a city. Use the indicated monster to destroy blocks in the city until the bonus monster is unlocked.

Successfully complete the game with the "Par Scores Met" award for all cities.

Successfully complete the game with the "All Challenges Met" award for all cities.

Unlock the other 29 monsters.

Go to a billboard on a roof and kick it to change it to a funnier version. For example, in Las Vegas with the large slot machine there is a "Beauty's Only Skin Deep" billboard. Kick the woman in the face to see the girl from The Exorcist.

Allow the game to begin demo mode and have it auto-play. Any monsters unlocked by the CPU during demo mode will remain unlocked for your game.

Press any button while game is loading. The monster you selected will make funny noises.

Bananas: Good for George
Chili Peppers: Good for Nick
Fire: Good for Nick
Poison: Good for kingston
Steak: Hurts Rojo
Water: Venus can drink water from pipe leaks. Gilman is immune to water leaks.

If a policeman is bothering you, lure him away from his vehicle and eliminate him (kick, eat, grab and jump, ground smash, etc.). Never destroy his car, and no more police officers will arrive(excluding S.W.A.T., or army tanks).