Boolossus as seen in Luigi's Mansion.
Series Mario series
First appearance Luigi's Mansion
Created by Nintendo
Quotes • Gallery

Boolossus is a gigantic Boo composed of fifteen smaller Boos in Luigi's Mansion. It is the third boss of the game and is similar to other ghost bosses in the Mario series. It makes a cameo appearance in Mario Kart: Double Dash‼.


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