Boo (character)

Boos (japanese: テレサ Teresa) is a fictional ghost that appears in the Mario and Yoshi series of video games. Boos first appeared in Super Mario Bros. 3.[1] In which they were named "Boo Diddley". Since then, they have become a common enemy in the Mario games. They sometimes appear as playable characters in the Mario spin-off games. In some games, such as Paper Mario, they help Mario during his adventure. They are named after the sound that a person might make when they want to scare someone ("boo!").

Boos most often attack the player by sneaking up behind the player while the player's back is turned to them.[2] When the player looks at them, they will hide their faces. They cannot be defeated without certain items or abilities. Boo are voiced by Sanae Susaki.