Trading Card description:Don't turn your back on this ghost. The ultimate sneaky spook, Boo will not make a move when you look at it, so stare it down to keep it in one place. Turn away for an instant and it will be hot on your trail. You will find Boos in ghost houses throughout the game. Use a Star power-up to take these spooks out.
Nintendo 3DS Ambassador Program digital manual bio:With it, you can steal items held by other players. After using it you become translucent, with Shells and Bananas passing right through you. If you are ranked second or below, you will haunt the player in first, disturbing his or her performance.
A white, cloud-like ghost. Shy and withdrawn. When you face it, it is shy and does not move. However, once you turn your back, it persistently chases after you with an ogre-like face.
Shogakukan guide: 背中を向けると追ってくるが、むかい合うと顔をかくして動かなくなる。背中が弱点。[2] (When you turn your back to it, it will chase you, but when you face it, it covers its face and stays still. Its back is its weak point.)
Player's Guide:Big Boos in training, these bite-sized guys would love to take a bite out of Yoshi.[3]
Shogakukan guide (Game Boy Advance version): 目が合うと動かないが、背を向けると追ってくる。攻撃できるのは移動中だけだ。かべなどにタマゴをバウンドさせて倒せば、スターが1個出現。[4] (They do not move when they see you, but if you turn your back on them, they will chase you. It can only attack while moving. If you can defeat it by bouncing an egg off a wall or other object, a star will appear.)
Shogakukan guide: 恥ずかしがり屋のオバケ。ヨッシーと向き合うと動かなくなり、背を向けると近づいてくる。背を向けて、反射でタマゴをぶつけると倒すことができる。[5](A shy ghost. When facing Yoshi, it stops moving, and when you turn your back on it, it comes closer. You can defeat it by turning your back on it and hitting it with an egg in reflex.)
Instruction booklet description:She floats in the air and is hard to hit. When Big Boo becomes transparent, she cannot be hit. A shell will simply pass through without damaging her.[6]
Nintendo 64 Spieleberater:Der absolute Nerv-Geist, der da in der Gegend rumspukt. Den begrüß ich gleich mit Ei![8] (The absolute nervous spirit, which spooks around there in the area. I'll greet him right away with an egg!)
Wii Virtual Console manual:Boo will steal coins or stars from any character you choose, but it costs five coins to steal coins and 50 coins to steal a star. If Boo comes to steal coins from you, press repeatedly to chase him away. You may be able to limit the number of coins he steals.
Ghost Minor: A constellation based on the little ghosts who cannot bear the gaze of others, turning away to hide their shame. Poor little guys. Or are they?
Bio:Boo can seriously curve balls to the left and right. Boo's shots, especially the Slice, are literally very tricky. Also, Boo can quickly catch balls with a ghostly ability, even distant ones.
Bio 2:You never know what to expect with Boo - he can bend shots to his left or right and can even use his ghostly abilities to reach distant balls.
Instruction booklet description:Anyway, Boos are the worst! The Boos are the ones that kidnapped your brother. The Boos are all hiding somewhere in the mansion. You've got to catch them!
How to unlock: Randomly obtainable from the Lottery after unlocking all characters.
These shy spirits inhabit Mario's world and have been known to vanish or freeze when met face-to-face. In recent years, they seem to have overcome their fears in order to pursue tennis and other social activities. They usually appear in groups and fly in formation. From time to time, giant Boos make surprise appearances.
Appears in: NESSuper Mario Bros. 3 DSYoshi's Island DS
How to unlock: Random
A bashful ghost who draws near when your back is turned but shyly stops and disappears when you face it. Boos have been seen recently in activities like baseball and tennis, so it's thought that they may have conquered their fear of humans. Boos are also characterized by having a variety of different weaknesses between forms.
Don't look so surprised—even some ghosts are shy! It's like a game of Red Light Green Light: your face means stop, and the back of your head means go. So be very careful if you turn your back. Boo also shows up in the Mario Kart series, making your kart invisible to other racers.(American English)
Even ghosts can be shy, and these guys are so shy, they can't even attack you if you're watching! It's kind of like they're always playing a ghostly game of statues. Just don't turn your back on them and you'll be all right! That said, they make fine allies in the Mario Kart series, where they can turn you invisible for a while.(British English)
Minion Quest: The Search for Bowser profile:For Bowser's sake, they won't be frightened! No, really! Prone to mocking their foes and attacking from above.
A somewhat shy ghost that can make itself or its allies invisible. It may be a ghost, but it's pretty cute.
Tattle
That's a Boo. It's everyone's favorite ghost. …Well, most everyone… Max HP is 7, Attack is 3, and Defense is 0. It's nothing to write home about on the Attack side, but it can turn invisible. If it turns invisible, we won't be able to hit it, so beat it while you can see it. Boos are kinda cute, but I sure wouldn't want to meet one in a dark alley. If I ran into one in the bathroom in the middle of the night, I'd… Well, never you mind what I'd do.
That bashful specter is a Boo. It's very fond of dark places... Max HP is 4 and Attack is 1. It will disappear if you stare at it too long... But it will reappear and chase after you the moment you turn your back on it... To outfox it, let it approach with your back turned, then attack or use an item...
Shogakukan guide: ヨッシーに向かって飛んでくる幽霊。ただし、勤くのは、ヨッシーが 背中を向けているときのみ。テレサのほうを振り向くと動きを止める。[10] (A ghost that flies toward Yoshi. However, it only moves when Yoshi's back is turned. When he turns his head towards Boo, it will stop moving.)
Bio: Bowser's underling ghost. Behind the scary face lies a very shy soul. Look most Boos in the eyes and they'll cover their faces...but turn around and they'll attack you! Boos confuse their enemies by flickering in and out of the visible realm, appearing at inconvenient times.
Bio: Fantastic curveball with excellent bat control.
Boo's official profile card from Mario Super Sluggers (front)
Boo's official profile card from Mario Super Sluggers (back)
Collectible card info:Normally the shiest of spirits, Boo isn't afraid to show off the strongest changeup in the game when he takes the mound. His teleportation ability comes in handy when base-running–or base-floating in his case.
These shy spirits inhabit Mario's world and have been known to vanish or freeze when met face-to-face. In recent years, they seem to have overcome their fears in order to pursue tennis and other social activities. They usually appear in groups and fly in formation. From time to time, giant Boos make surprise appearances!
Halloween Theme (2017): Boo’s the name. Scary is the game! The bravest heroes in the Mushroom Kingdom know better than to turn their backs on Boo. This ghostly creature floats through some of the creepiest places in the Mario universe, from haunted mansions to underground lairs.[14]
Who's Your Mushroom Kingdom BFF?:Boo's a good friend, because it'll scare away your enemies. But it's also kinda shy, so don't stare at it.
Boo A ghost that loves mischief, and often appears from dark areas. Even though it slowly tries to fly down and approach you from behind, it seems if you turn and face it directly, it becomes embarrassed and completely unable to move. Maybe its name Teresa comes from the word Tereya-san (shy person)? There are various Boos, among them there's even a large Boo that wears a crown!
A ghost that appears in dark places and likes to play pranks. Despite being a ghost it's totally shy, and upon making eye contact will become embarrassed and unable to move.