For those who don't know, from 1986-1991, the Ghostbusters had an animated series, ironically called, The Real Ghostbusters. One of there episodes, "Who're you calling Two-Dimensional?", the busters are literally sucked into a cartoon world to rescue an animator named Ealt Fleischman, whose being tortured by one of his creations.
Dopey Dog is one of the protagonist characters in this cartoon world and seems to be an amalgamation of Disney's Goofy, WB Sam sheepdog, and Underdog. On the right, is a revision under my style, incorporating elements of Mr. Incredible and Solatorobo's Kouglof.
®Ghostbusters is Sony's property