Monster Force Cheats...
Drew
Beat the game with Crystal rating in every level.
Exit Level
On the pause screen, you can return to the level-select screen by pressing L + R + A.
Invincibility
On the Pause screen, hold L + R + B and press Down, now your energy will refill continuously.
Level Skip
During game play, hold L + R + A and press Up to complete the current level.
Unlock Atlantis arena
Defeat the Atlantis Shadow Creature.
Unlock Castle arena
Beat the game.
Unlock Cemetry arena
Defeat the Cemetry Shadow Creature.
Unlock Clouds arena
Defeat the Clouds Shadow Creature.
Unlock Desert arena
Defeat the Desert Shadow Creature.
Unlock Factory arena
Defeat the Factory Shadow Creature.
Unlock Garden arena
Defeat the Garden Pumpkin Boss.
Unlock Mina and Drew
On the character select screen, hold L + R + B and press RIGHT.
Unlock Temple arena
Defeat the Temple Dragon Boss.
Unlock Village arena
Defeat the Village Shadow Creature