This page contains The Grim Adventures Of Billy And Mandy Unlockables for Nintendo Wii called "Alternate costumes" and has been posted or updated on Nov 21, 2006 by martymar007.
- Developer: High Voltage Software
- Publisher: Midway
- Genre: Action Beat-'Em-Up
- Release: Nov 16, 2006
- ESRB: Everyone 10+
You have to finish Story mode with any character to unlock an alternate costume for that person.
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