Nothing in the world can make Garfield get involved in anything besides eating, until the muscular super cat Garzooka comes crashing into Cartoon World from the Comic Book universe with terrifying news. Garfield summons up the willpower to join his superhero Garzooka in a fight to save their worlds. On the planet Dorkon, Professor Wally shows Emperor Jon his new invention, The Moscram ray gun, a device powered by the Klopman crystal that can scramble inanimate objects and organisms into new creatures under the user's control. But Emperor Jon is concerned about finding a wife to continue the royal bloodline. Soon a warship lands outside the palace. Emperor Jon sees Vetvix, and asks her if he can marry her. She agrees, but only because she wanted to steal the Moscram Ray Gun. She zombifies Emperor Jon's guards.