Boo

“(BOO! Did I distract you?)” —Boo, Mario Golf: Toadstool Tour

Boo is a ghost who's first appearance was in Super Mario Bros. 3.

Real Games

 * Super Mario Bros. 3 (first appearance)
 * Super Mario 64
 * Mario Kart 64
 * Super Mario Sunshine
 * Super Mario Galaxy
 * Mario Kart Wii
 * Mario Super Sluggers
 * Super Mario 3D Land
 * Mario Kart 7
 * Mario Party: Island Tour
 * Super Mario 3D World

Fanon Games

 * Super Boo Bros.
 * Boo Kart
 * Boo Tennis
 * Super Boo Bros. 2