This page contains The Grim Adventures Of Billy And Mandy Unlockables for GameBoy Advance called "Unlock Grim in Story Mode" and has been posted or updated on Nov 13, 2006 by KittyCats41.
- Developer: Full Fat
- Publisher: Midway
- Genre: Action Beat-'Em-Up
- Release: Oct 31, 2006
- ESRB: Everyone 10+
Unlock Grim in Story Mode
Find 15 mojo balls and beat Mandy's Story.
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