List of Boos in Luigi's Mansion

In Luigi's Mansion, Luigi releases fifty Boos (fifty-one including King Boo). He must then catch each one throughout the game. Thirty-five of the fifty regular Boos are named and each one always starts out in a particular room (the other fifteen form together to make Boolossus). Once Luigi uncovers a Boo, he must drain all of its HP with the Poltergust 3000 to capture it; however, there is a chance Luigi can uncover a Boo Ball or bomb instead. Boos are capable of fleeing to other rooms, forcing Luigi to chase them down. If a Boo escapes into a dark room or hallway, their HP takes longer to deplete. Some Boos tackle Luigi when threatened, while others do not. Luigi can still take damage from these on contact, however.

Luigi needs to catch 5 Boos to unlock the washroom on the first floor, 20 of them need to be captured to access the balcony on the third floor and battle Boolossus, and 40 of them need to be captured to fight King Boo (45 in the PAL Hidden Mansion). If Luigi manages to vacuum up all 50 Boos, the last one drops a Gold Diamond.

The following chart shows each Boo, its amount of HP, whether or not it has the ability to attack, the room it starts out in, the different hiding places in that room and the object or saying that the said Boo is based on. Note that if the game is turned off before any particular Boo is caught, it returns to the room it started in with all its HP restored.

Trivia

 * The Boos with 300 HP have the second highest HP in the game of any ghost, the next highest being King Boo.
 * In the Japanese version, Kung Boo, Boogie, GumBoo, Booligan, Booigi, Booffant, and Boolossus return in the sequel, Luigi's Mansion: Dark Moon; in English versions, they are respectively renamed ComBooter, Boofoon, Boogie Woogie, Boolldog, MamBoo, Boo Boo and "Big Boo" for their reappearance.
 * In the Nintendo 3DS remake of Luigi's Mansion, Booligan was changed to Boolldog to reflect the name changes in Luigi's Mansion: Dark Moon; all other Boos keep their original English names.
 * Booscaster is the only Boo out of the 35 named Boos that does not mention his name upon being found. However, the player can find out his name by letting him disappear, then finding him again, as his name will appear in his next speech blurb.
 * Every time a Boo flees into another room and hides, their dialogue will change when found again.
 * Even if all the Boos are not captured, King Boo will still mention that Luigi vacuumed up all his friends.
 * They can't be captured in dark rooms.

Liste der Buu Huus in Luigi's Mansion Lista dei Boo di Luigi's Mansion