Underfist HB Titlecard
Started October 12, 2008
Ended October 12, 2008
Episodes 1
Channels Cartoon Network

Underfist was supposed to be the fourth installment in the Billy and Mandy franchise. However, due to Maxwell Atoms' contract with Cartoon Network expiring, the series was never made. But one special was made and it was called Underfist: Halloween Bash.


This series was supposed to focus on Billy, Mandy, and Grim employing a ragtag group of crimefighers who go about saving the world (or the town of Endsville) from monsters known as Underfist, which consists of Irwin, Hoss Delgado, Jeff the Spider, Fred Fredburger and General Skarr. By the pilot special, it is implied that the series was going to be darker and more action-packed in tone.


Although the show did have the first/pilot episode released, the series was canceled. Although it was believed that due to the credits in Underfist: Halloween Bash that a few more were planned with names and plots and though these credits and work from Maxwell Atom's blog, it shows that there was more episodes and characters planned for a release.

Possible episodes

Possible characters


  • If this series came to be, it would have been the third spin-off of a Cartoon Cartoon.


Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.