This page contains Gekitou! Custom Robo Unlockables for Nintendo DS called "The underground" and has been posted or updated on Jun 13, 2007 by Wahinhist. Let us know what you think of this Unlockable by thumbs voting.
- Developer: Noise Inc.
- Publisher: Nintendo
- Genre: Action Fighting
- Release Date: Mar 19, 2007
- ESRB: Everyone 10+
Beat a dozen grudge matches, then beat your shadow self. Once you beat him, talk to the man in SW bayside to open the secret entrance.
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