Aaahh!!! Real Monsters (1994)

Season 3: Episode 9

Ickis is in the middle of projecting a botched scare on the viewfinder when The Gromble sees something on the screen that makes him turn white as a sheet-- the red delivery van of Dick Jolly of "Jolly Rooter Sewer Service." Years earlier The Gromble tried to scare Jolly but was thwarted by Jolly's horrible "sewer eater" (the Roto-Rooter machine). The Gromble takes Ickis, Krumm and Oblina on a misguided search for Jolly.