Boos are minor characters in the SMG4 series.

They are white, round ghost enemies from the Mario franchise. The species has appeared several times in SuperMarioGlitchy4's videos. Other types of Boos include Big Boos and their leader, King Boo.

Luigi is frightened by them, but, ironically, they are scaredy cats as revealed in MARIOBUSTERS.

Notable Individuals


NOTE: This list may be incomplete.

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