The Boo Troop is a group of Boos, Pink Boos, Dry Bones, Fangs, and other ghosts that has a main role in the McBoo Series. The Boo Troop is run by King Boo and later his four minions McBoo, O'Lantern, Akro Bat, and Ghoularry. It's usually a part of the Koopa Troop, as Boos, Dry Bones and Fangs are also in those troops. A failed sub-troop is the Dark Troop, as it once took over the main Troop because of a member of the Dark Troop.

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