"Wicked Jack" is a mutant pumpkin. He is the leader of a group of similar pumpkins who were mutated by green goo dumped onto Farmer Jebs' pumpkin field by a mysterious flying saucer. He and the other pumpkins sole intention was to conquer earth and make the whole world their pumpkin patch. He and the other pumpkins were foiled by the monsters and Wicked Jack himself was killed by Insectosaurus. He is the main antagonist of the short.