This page contains Super Mario Galaxy 2 Unlockables for Nintendo Wii called "Secret World" and has been posted or updated on May 27, 2010 by dhairich. Let us know what you think of this Unlockable by thumbs voting.
- Developer: Nintendo EAD Tokyo
- Publisher: Nintendo
- Genre: Action Platformer 3D
- Release Date: May 23, 2010
- ESRB: Everyone
Beat the game once.
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