Howlin' Jack Talbot is the guest star in The Muppet Show Comic Book: Muppet Mash Part 3. He is a legendary singer, with his greatest hit being "The Monster Munch". His biggest fan is Animal, while also being admired by the rest of Dr. Teeth and the Electric Mayhem".
During each musical performance, he leaves the stage in mid-song and a wolf suddenly shows up on-stage, leading to everybody suspecting that he keeps turning into the wolf. However, it is eventually revealed that the wolf is his pet, Wuffles, and that the reason for him leaving the stage is due to his old age causing him to forget the words while performing them, with "The Monster Munch" being the only one he can remember all the lyrics to.
However, after the show ends, he is shown in wolf form, running with Wuffles.
Howlin' Jack also has an inflatable leg, which replaces a wooden leg that he used to have.