Boolossus is a gigantic Boo made of 15 smaller Boos seen in Luigi's Mansion. He is one of the many bosses in the game, and is similar to other ghost bosses in the Mario video game series.
Appearances
- Luigi's Mansion - A boss in the video game.
- Mario Kart Double Dash!! - A painting on the wall of the Luigi's Mansion battle stage.
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