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That scaredy-cat Luigi has made it this far... Oh, we're so frightened! I guess it's our turn, then... All right, Boos, let's assume our real form... But first, how about giving him a little scare!
~ Boolossus preparing to battle Luigi.

Boolossus, also known as the "Jumbo Ghost", is one of the two secondary antagonists (alongside Vincent Van Gore) of the video game Luigi's Mansion, and a minor antagonist in Luigi's Mansion 3. It is a gargantuan Boo composed of fifteen smaller Boos, serving as the third boss of the first game. his capture at the hands of Professor E. Gadd resulted in King Boo releasing all of the Portrait Ghosts and therefore, the events of Luigi’s Mansion in the first place.


Luigi's Mansion

Boolossus first appeared in Luigi's Mansion. One of the most powerful ghosts in King Boo's army, he was caught by Professer E. Gadd who stuffed his essence into a painting, along with many other ghosts of the mansion. This resulted in King Boo attacking E. Gadd's lab out of anger. During his assault, King Boo rescued Boolossus and ordered the rest of the Boos to free the rest of E. Gadd's portrait ghosts in the mansion. Once freed, King Boo creates a large mansion within the span of a single night just outside E. Gadd's lab, where the rest of the portrait ghosts and Boolossus reside. After being trapped in the Storage Room, Boolossus is among the fifty Boos to escape when Luigi releases them all by accident. Boolossus waits on the large balcony on the third floor of the mansion. If Luigi attempts to access the balcony with less than twenty Boos captured, he will be sent back to the foyer by Boolossus until he captures at least twenty Boos.

Once Luigi reaches the balcony, he will find Boolossus' squadron together in a circle awaiting his arrival. Together, the Boos surround and frighten Luigi by enclosing their circle around him. With Luigi in their grasp, the Boos teleport him to a dimensional version of the balcony and combine their strength to become Boolossus. Boolossus is at first a massive and slow Boo that tries to crush Luigi by bouncing on him. In order to break Boolossus into smaller Boos, Luigi must use the Poltergust 3000 to pull Boolossus into one of the two the unicorn ice sculptures on the balcony. Luigi then uses an Ice Elemental Ghost to freeze the Boos in ice and suck them up. After a while, the Boos will form Booslossus again. He grows smaller and faster as more Boos are defeated, and the Boos are more hasty to avoid the ice beams. Once he and his fourteen minions are sucked up (each one has one hit point), Boolossus is defeated. His soul is then turned into a painting.

Luigi's Mansion 3

In Luigi's Mansion 3, Boolossus returns as the final boss of Scarescraper Mode, facing off with the player and their team once they reach the final floor. He has similar abilities to King Boo but is much larger is unable to multiply himself aside from being split apart to smaller Boos. All the smaller Boos must be defeated in order to win the battle against Boolossus.





  • Boolossus' name is a portmanteau of "Boo" and "Colossus", probably due to his massive size.
    • The name "Boolossus" also literally translates to "Giant Boo".
  • Jalhalla from the Zelda series is similar to him in terms of weaknesses.
  • Boolossus appears in the Mario UNO cards on the "Draw 4" card.
  • In the PAL version of Luigi's Mansion, Luigi rides around on top of the Poltergust 3000 during the Boolossus battle within the Hidden Mansion. This provides faster transportation, but also less traction. However, this does not happen in any version of the Nintendo 3DS edition.
  • Boolossus is the only Portrait Ghost to not have HP.
  • Along with King Boo, Boolossus is one of the two only Boos that are Portrait Ghosts.
  • Oddly, Boolossus is Ghost #22 in the gallery even though he is the sixteenth ghost caught.
  • Boolossus has other two names, "Jumbo Boo" ("Janbo Teresa" in Japanese) and "Buulussus" (in German and later translated to English).
  • Boolossus bears a resemblance to Big Boo from Super Mario 64 as well as King Boo's prototype design in the pre-release of Luigi's Mansion.


           Luigi's Mansion Logo.png Villains

Luigi's Mansion
Boos | Ghosts
Portrait Ghosts
Biff Atlas | Bogmire | Boolossus | Chauncey | Clockwork Soldiers | Floating Whirlindas | Henry and Orville | Jarvis | King Boo | Lydia | Melody Pianissima | Miss Petunia | Mr. Luggs | Nana | Neville | Shivers | Sir Weston | Slim Bankshot | Spooky | Sue Pea | Uncle Grimmly | Vincent Van Gore

Luigi's Mansion: Dark Moon
Big Boo | Poltergeist | The Three Sisters
Grouchy Possessor | Harsh Possessor | Overset Possessor | Shrewd Possessor | Tough Possessor
Beetle Whisperer | Bomb Brother | Creeper Launcher | Primordial Goo | Terrible Teleporter | The Brain

Luigi's Mansion 3
Amadeus Wolfgeist | Captain Fishook | Chambrea | Chef Soulfflé | Clem | DJ Phantasmagloria | Dr. Potter | Hellen Gravely | Johnny Deepend | Ghostzilla | King MacFrights | Kruller | Nikki, Lindsey & Ginny | Polterkitty | Serpci | Steward | Ug

           TheMario.png Villains

Koopa Troop
Bowser | Baby Bowser | Bowser Jr. | Captain Goomba | Koopalings (Larry Koopa | Morton Koopa Jr. | Wendy O. Koopa | Iggy Koopa | Roy Koopa | Lemmy Koopa | Ludwig Von Koopa) | Kamek | King Boo | Boom Boom | Pom Pom | Reznor | Mega Goomba | Lakithunder | Mummipokey | Burt the Bashful | Salvo the Slime | Roger the Potted Ghost | Koopa Kids | Hoo | Blizzaurus | Army Hammer Bro | Elite Trio
Super Mario 64
King Bob-omb | Whomp King | Goomba King
Galaxy Armada
King Kaliente | Bugaboom | Peewee Piranha | Topmaniac | Bouldergeist | Dino Piranha | Major Burrows | Prince Pikante | Rollodillo | Glamdozer | Giga Lakitu | Petey Piranha | Gobblegut
Super Mario 3D World
Super Mario Odyssey
Mechawiggler | Broodals (Topper | Harriet | Spewart | Rango) | Madame Broode | Ruined Dragon | Cookatiel | Torkdrift
Goombas | Boos | Koopa Troopas | Chain Chomps | Hammer Bros. | Shy Guys | Magikoopas | Pokeys | Lakitus | Toadies | Bob-ombs | Piranha Plants | Bloopers | Wigglers
8 Bit Club
Wart | Mouser | Tryclyde | Fryguy | Clawgrip | Birdo | Shy Guys
Smithy Gang
Smithy | Exor | Mack | Bowyer | Yaridovich | Axem Rangers | Blade | Count Down | Domino
Beanbean Kingdom
Cackletta | Fawful | Dark Star | Midbus | Fawful Express | Fawful Mountain | Super Peach's Castle of Fury | Crawful | Snawful | Chain Chawful | Fawflant | Fawful Guy | Fawfulcopter | Fawflopper | Mawful Mole | Mechawful
Popple | Rookie | Beanies | Mechawful | Sharpea | Troopea | Beanerang Bro | Clumphs | Lakipea
Elder Princess Shroob | Princess Shroob | Sunnycide
Antasma | Belome | Best Fitness Friends | Big Guy the Stilted | Black Jewel | Booster | Bowser (USA) | Chuckolator | Count Cannoli | Croco | Culex | Dodo | Donkey Kong | Donkey Kong (Mario VS Donkey Kong) | Draggadon | Foreman Spike | Gooper Blooper | Grouchy Possessor | Harsh Possessor | Jojora | Kaptain Skurvy | Kent C. Koopa | King K. Rool | Kritters | Lucien | Mario | MegaBug | Mollusque-Lancuer | Nabbit | Overset Possessor | Peps | Phantamanta | Portrait Ghosts: (Neville | Chauncey | Bogmire | Biff Atlas | Boolossus | Sir Weston | Vincent Van Gore) | Rabbids: (Ziggies | Phantom of the Bwahpera | Rabbid Kong) | Punchinello | Ricky | Rudy the Clown | Sabasa | Shake King | Shrewd Possessor | Smorg | Squizzard | Tatanga | Three Little Pigheads | Tolstar | Tough Possessor | Tower Power Pokey | Valentina | Viruses | Waluigi | Wario | Watinga | Wingo | Yellow Belly/Helio

Koopa Troop
Paper Bowser | Paper Bowser Jr. | Paper Koopalings (Larry Koopa | Morton Koopa Jr. | Wendy O. Koopa | Iggy Koopa | Roy Koopa | Lemmy Koopa | Ludwig von Koopa) | Paper Kamek | Kammy Koopa | Paper Petey Piranha | Goomba King | Red & Blue Goomba | Koopa Bros | Tutankoopa | Tubba Blubba | General Guy | Lava Piranha | Huff N. Puff | Crystal King
Goombas | Boos | Koopa Troopas | Chain Chomps | Hammer Bros. | Shy Guys | Magikoopas | Bob-ombs | Piranha Plants
Secret Society of X-Nauts
Sir Grodus | Lord Crump | Shadow Sirens | Doopliss | Shadow Queen
Count Bleck's Minions
Count Bleck | Nastasia | O'Chunks | Mimi | Dimentio | Mr. L
Folded Soldiers
King Olly | Handaconda | Paper Macho Soldiers
Legion of Stationery
Colored Pencils | Rubber Band | Hole Punch | Tape | Scissors | Stapler
Jr. Troopa | Hooktail | Rawk Hawk | Grubba | Cortez | Gloomtail | King Croacus | Shadoo | Wracktail | Skellobits | Bonechill | Count Bleck's Father | Francis | Mizzter Blizzard | Lamp Scam Snifit


President Koopa | Lena | Iggy and Spike

Big Bad Wolf | Count Koopula | "Crime Wave" Clyde | King Koopa | Robot Princess | Wizardheimer
King Koopa (OVA) | King Koopa (Amada)

See Also
Donkey Kong Villains | Luigi's Mansion Villains | Wario Villains