King Boo

King Boo is an enemy and boss from the Mario series.

His first game was in Luigi's Mansion where he traps Mario in a painting, and plans to do so with Luigi. Luigi has to defeat King Boo with his Poltergust 3000, which will suck up any Boo. In the final fight with King Boo, he is inside a Bowser suit, and when he comes out, that's your chance to harm him.

He also makes many other appearances such as a boss in Super Mario Sunshine and Super Mario 64 DS, a playable character in Mario Kart: Double Dash!!, Mario Kart Wii and Mario Superstar Baseball. And as a challenging boss in Mario Kart DS.

In Luigi's Mansion, he is the size of a regular Boo, if not slightly bigger, has a bigger mouth, and a ruby crown on his head, but in Super Mario Sunshine he is much larger and wider then he was in Luigi's Mansion and has tired eyes and drool coming out of his mouth. In Mario Kart: Double Dash and other games he looks more like he did in Luigi's Mansion, only with different colored eyes and a different crown.