Boolossus as seen in Luigi's Mansion.
|First appearance||Luigi's Mansion|
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‼.
- Luigi's Mansion - The third major boss in the game.
- Mario Kart: Double Dash‼ - In a portrait on the wall of the Luigi's Mansion battle stage.
|Luigi's Mansion characters|
|Allies||Luigi • Professor E. Gadd • Mario|
|Portrait Ghosts||Biff Atlas • Bogmire • Boolossus • Chauncey • Clockwork Soldiers • Floating Whirlindas • Henry and Orville • Jarvis • King Boo • Lydia • Madame Clairvoya • Melody Pianissima • Miss Petunia • Mr. Luggs • Nana • Neville • Shivers • Sir Weston • Slim Bankshot • Spooky • Sue Pea • Uncle Grimmly • Vincent Van Gore|