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The Acorn Mushroom is a mushroom in New Super Mario Bros. U. It transforms anybody who touches it into Flying Squirrel Mario. It looks like an acorn with eyes on the bottom. When Mario grabs an Acorn Mushroom, he can lightly glide in a similar way to Cape Mario and Raccoon Mario and cling walls, also being able to air jump while gliding.
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The Acorn Mushroom.