Big Boo (Paper Mario series)



Atomic Boo is a Boo made up of exactly two hundred different Boos. The Atomic Boo is an optional mini-boss in Paper Mario: The Thousand-Year Door. To fight this boss, Mario must go to the Creepy Steeple after freeing the Boos in Chapter 4 and agreeing to be nice to them, and let Mario get caught in some of the Boos and knock them away twice with the Super Hammer by using the Spin Attack. This will anger the Boos, who will then combine together to make a giant Boo and attack Mario. Atomic Boo attacks by flinging Boos at Mario, charging up a powerful glare attack, hiding his face and becoming invisible like regular Boos, floating over and falling onto both Mario and his partner, and inflicting Mario with status ailments such as confusion and paralysis. Once Atomic Boo is defeated, he will relinquish his Lucky Start badge to Mario and the Boos will stop their swarming and appear as normal enemies.



A purple variant of Atomic Boo, called Dark Atomic Boo, was found in the game's coding but cannot be fought. Presumably it would serve as a late-game mini-boss, perhaps in Poshley Sanctum, where the smaller Dark Boo can be found in abundance. It's reasonable to assume that Dark Atomic Boo would have used more powerful versions of Atomic Boo's attacks.

Atomic Boo is similar to Boolossus from the game Luigi's Mansion, and Bigger Boo from Super Mario World 2: Yoshi's Island.

Stats and Tattle Information

 * HP: 40
 * Attack: 4
 * Defense: 0
 * Location: Creepy Steeple
 * Tattle Number: 72
 * Tattle Log: A massive creature made up of countless Boos. It attacks by breaking apart and sending out hundreds of Boos.
 * Tattle: That's an Atomic Boo. It's a giant Boo made up of a ton of smaller Boos. This thing will try to smoosh us. It can also split up and send hundreds of Boos at us. And, when he attacks, we might get so scared that we get confused or can't move. I sure wouldn't want to see this thing standing behind me in the middle of the night... Creeeeeepy...