Irwin, Hoss Delgado, Jeff the Spider, Fred Fredburger, and General Skarr from the "Grim Adventures of Billy and Mandy" team up to fight an evil candy army from the Underworld on Halloween.
| Production | Brian A. Miller | Executive Producer |
| Production | Jennifer Pelphrey | Supervising Producer |
| Production | Maxwell Atoms | Executive Producer |
| Sound | Drew Neumann | Music |
| Art | Maxwell Atoms | Art Direction |
| Writing | Maxwell Atoms | Writer |
| Production | James Silverman | Associate Producer |
| Production | Shaun Cashman | Supervising Producer |
| Directing | Shaun Cashman | Director |
| Crew | Maxwell Atoms | Creator |
| Editing | Illya Owens | Editor |
| Production | Kris Zimmerman | Casting |
| Art | Maxwell Atoms | Storyboard Artist |
