Wonder if John K and the old Spumco crew ever had the same idea of creating an actual Muddy Mudskipper cartoon?
Marvel Comics beat them to the punch by creating this one-shot story featuring Stimpy's favorite "puppet" in The Ren & Stimpy Show #4 from 1993.
(Muddy's adversary is Cicero Seagull from the cartoon, "Untamed World".)
I noticed that the story isn't credited. If it's the same people who worked on the main story, Written by Dan Slott, Illustrated by Mike Kazaleh, Lettered by Brad K. Joyce and Colored by Ed Lazellari.