The Grim Adventures of Billy and Mandy Specials Episode 3 Underfist: Halloween Bash ( Air Date 2008-10-12 ) Genre Animation, Comedy, Kids category. Overview "Billy, Irwin and Mandy go trick-or-treating on Halloween, and an evil marshmallow bunny attacks children with chocolate beasts.".
The Grim Adventures of Billy and Mandy Specials Episode 3 Underfist: Halloween Bash
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- Watch: The Grim Adventures of Billy and Mandy Specials Episode 3 Underfist: Halloween Bash on CWR-CRB
- Stars: Greg Eagles, Richard Steven Horvitz, Grey DeLisle, Vanessa Marshall
- Director: Brian A. Miller, Jay Bastian, Gregory Hinde, Drew Neumann
