The Cartoon World is a dimension created by Walt Fleischman and was inhabited by his creations.
Sometime in the 1940s, while in his private studio, Walt Fleischman created a Cartoon World with his mind and photographed their exploits. One of his creations named Winchester Wolf opened a Cartoon Door and pulled Walt to the Cartoon World. He was tormented for 40 years and never aged. The Ghostbusters entered the dimension and recruited Dopey Dog to help them. Along with all the animal heroes, they tore the edge of the world. This violated Walt's contract and began to destroy the Cartoon World. The Ghostbusters and Walt jumped to a giant film projector's sprockets and escaped to the real world as the Cartoon World faded away.
- The Particle Thrower didn't function in the Cartoon World.