Powerpuff Girls Doujinshi
The Grim Tales From Down Below
Fred made a few random cameo appearances in the comic.
Underfist is a spin-off special of The Grim Adventures of Billy & Mandy. It aired on October 12, 2008. It tied as the number 1 program for the week among all broadcast and basic cable networks with boys 6-11, and earned between 19% and 76% growth across all kid demos. The special was going to be the plot for a new series spin-off of Billy and Mandy, but the contract of Maxwell Attoms in Cartoon Network expired and the special was the finale of Grim Adventures.