It's Halloween, and Timmy want's a Jack-O-Bot costume as his Halloween costume. Unfortunately, the only four Jack-O-Bot costumes in existence were won in a contest, which Trixie, Veronica, Tad, and Chad won because they bribed the judges. To make things worse, Vicky is being paid by Timmy's parents to take Timmy and his friends trick-or-treating, and forces him to wear a mummy costume made out of toilet paper. The popular kids get all the good candy, while Timmy and his friends get junk, and even then Vicky is stealing whatever they do get from them. Realizing that Vicky is scary and gets all the candy because of it, Timmy wishes that everyone's Halloween costumes were real and scary, but this causes the popular kids to turn into actual Jack-O-Bots which threaten to blow up the Earth!