Bored by a class discussion on mummies, Jimmy decides to take his classmates to see the real deal. But when his Electro-Life gizmo accidentally brings the mummies to life, Jimmy's got to keep himself and his friends from becoming the latest addition to Queen Hazabataslapya's Tomb.
Carl and Sheen are looking for the ultimate scary costume for Halloween, and Jimmy is just the kid who can help. With his latest invention, The Neutronic Monster Maker, Jimmy transforms his friends' physical appearances into those of a Vampire and Werewolf. But the effects of the transformation don't stop at crazy body hair and pointy teeth; Carl and Sheen quickly mutate into real monsters. Jimmy must reverse the effects before Carl and Sheen wreak havoc in Retroville.
A lake monster has been spotted off the coast of Retroville, and all the town is in panic - except for Jimmy who doubts the monster's existence. Armed with a collection of homing devices, his two best friends and a surly sea captain named Betty, Jimmy sets out to disprove the myth in an aquatic adventure straight out of "Jaws."/It's time for the school elections, and this year's candidates for class president are Jimmy, Sheen, Libby (with Cindy as her campaign manager) and the new kid in school, Bolbi.
Jimmy attempts to update those mischievous Nanobots (last seen in "Safety First") in order to correct errors in his homework, but the Nanobots take it upon themselves to correct everything for error. Finding the human race to be irredeemably flawed, they decide to delete them!
Jimmy is convinced that Santa Claus does not exist. To prove his theory, he travels to the North Pole where he discovers a remote toy factory.
Debi Derryberry
James Isaac Neutron
Jeff Garcia
Sheen Juarerra Estevez
Mark DeCarlo
Hugh Neutron
Rob Paulsen
Carlton Ulysses Wheezer
Megan Cavanagh
Judy Neutron