Board Thread:This is Fun/@comment-25301601-20140202172021/@comment-5429417-20140206234518

Yep! That is correct! King Boo appears in the Luigi's Mansion games where Luigi is main hero and not Mario. King Boo appears in mostly sequeals like Super Mario Sunshine and Mario Kart: Double Dash!!. King Boo is known as "The Big Boo" in Super Mario 64 (and Super Mario 64 DS as well). He's playable in the games metioned above and he is the leader of his species: the Boos.