This game is also available on GBA.
Retro Game Cheats for The Grim Adventures of Billy & Mandy (Nintendo Wii)
Effect: Play as Nerglings
When:
During game
How:
Successfully complete Story mode with all characters to unlock Nerglings.
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Effect: Play as Vikings
When:
During game
How:
Successfully complete Story mode with all characters and destroy every letter in the credits sequence to unlock Vikings.
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Effect: Alternate costumes
When:
During game
How:
Successfully complete Story mode with any character to unlock an alternate costume for that person.
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Effect: Play as Fred Fredburger
When:
During game
How:
Successfully complete Story mode with Billy, Mandy, Grim, or Irwin to unlock Fred Fredburger.
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Effect: Play as Eris
When:
During game
How:
Successfully complete Story mode with Billy, Mandy, Grim, or Irwin to unlock Eris.
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Effect: Unlock Jack O'Lantern
Effect: Unlock Lord Pain
Effect: Play as Chicken
When:
During game
How:
Successfully complete Story mode with all characters and accumulate 10 hours of game play time to unlock Chicken.
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Effect: Play as Hoss Delgado
When:
During game
How:
Successfully complete Mission 9 in Tier 1 in Mission mode to unlock Hoss Delgado.
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Effect: Play as Nergal
When:
During game
How:
Successfully complete Story mode with Billy, Mandy, Grim, or Irwin to unlock Nergal.
Submitted By:
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