A mystery item in the Super Mario 64 beta, the Beta Key is an item that can be found in Big Boo's Haunt. The key was inside a Big Boo (see pic below), its purpose is unknown.
Even though it never appeared in the final release of the Super Mario 64
game, its 3D model was left intact and can be accessed by using a GameShark.Super Mario 64 - Beta Boo Key Papercraft
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