The Grim Adventures of Billy and Mandy Specials Episode 3 Underfist: Halloween Bash 2007
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Billy, Irwin and Mandy go trick-or-treating on Halloween, and an evil marshmallow bunny attacks children with chocolate beasts.
- Released: 2008-10-12
- Runtime: 11 minutes
- Genre: Animation, Comedy, Kids
- Stars: Greg Eagles, Richard Steven Horvitz, Grey DeLisle, Vanessa Marshall
- Director: Brian A. Miller, Gregory Hinde, Drew Neumann, Jay Bastian
