Ghosts...don't...die! Heh heh heh! Can you get out of here...ALIVE?
~ The Boos in Super Mario 64.

The Boos are nasty ghost-like creatures that are seen a lot in the Super Mario Bros. series.

Their main method of attack is to attack Mario only while his back is turned. If Mario looks at them they freeze and turn invisible and do not move at all until he turns his back to them again.

The most powerful and most clever Boo among them is their vile leader, none other then King Boo. The second most powerful of Boos are the Big Boos.


  • Atomic Boo
  • Balloon Boo
  • Big Boo
  • Big Frame Boo
  • Big & Little Boo
  • Black Boo
  • Blindfold Boo
  • Bomb Boo
  • Boo Balloon
  • Boo Block
  • Boo Buddy Snake
  • Boo Buddy Swarm
  • Boo Guy
  • Boohemoth
  • Boo Man Bluff
  • Boo Stack
  • Broozer
  • Calm Fishing Boo
  • Circling Boo Buddies
  • Dark Boo
  • Dark Dark Boo
  • Disappearing Boo Buddy
  • Eerie
  • Fishin' Boo
  • Frame Boo
  • Ghoul Guy
  • Gold Boo
  • Green Boo
  • Li'l Boo
  • Mad Big Boo
  • Mad Boo
  • Mini Boos
  • Octoboo
  • Peepa
  • Red Boo
  • Shiny Boo
  • Sleepy Boo
  • Snufit
  • Stretch
  • Tail Boo
  • Terekuribō



  • Boo's Mario Strikers Charged Football outfits resembles the Spooky Speedster's outfit.
  • The manual for Mario Kart DS refers to the item Boo as "Boo Hoo".
  • Creator Shigeru Miyamoto got the idea for Boo from the wife of his co-worker and close friend Takashi Tezuka, as she is shy but one day got very angry at him for coming home late from work.
  • In both Super Mario 64 and Luigi's Mansion, Boo's old laugh is just a sped up version of Bowser's laugh from Super Mario 64 with echoes added. It was also reused in Mario Tennis 64 as well as the Nintendo DS remake of Super Mario 64 and in the first seven Mario Party games.
  • Strangely, in Mario Golf: Toadstool Tour, Boo hits right-handed, but in the Mario Baseball series', it hits left-handed.
  • In the Animal Crossing games, a character named Wisp appears, who bears a resemblance to Boo. The main difference is the facial appearance, and headgear.
  • In Super Mario Sunshine, the Boos are the only Boos that can be defeated by jumping on them outside of the Mario RPG titles.
  • Mumbies, enemies from the Kirby series, attack in an identical way to Boos.
  • The Boos' very own name is also shared by a group of fellow ghostly enemies called Boom Boos (also called "Booms") ruled by their leader King Boom Boo from Sonic Adventure 2.
           Mario Villains

Koopa Troop
Bowser | Bowser Jr. | Koopalings: (Larry Koopa | Morton Koopa Jr. | Wendy O. Koopa | Iggy Koopa | Roy Koopa | Lemmy Koopa | Ludwig Von Koopa) | King Boo (Luigi's Mansion) | Boos

8 Bit Club
Wart | Mouser | Tryclyde | Fryguy | Clawgrip | Birdo | Shy Guys

Secret Society of X-Nauts
Sir Grodus | Lord Crump | Shadow Sirens | Shadow Queen

Count Bleck's Minions
Count Bleck | Nastasia | O'Chunks | Mimi

Smithy Gang
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King K. Rool | Kremling Krew | Klump | Krusha | Krunch | Klubba

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