In order to have the scariest Halloween costumes ever, Jimmy uses his latest invention to morph Carl and Sheen into a Vampire and a Werewolf.

Sheen's dad, Mr. Estevez desperately wants to impress his son, so he pretends he is a superhero.

Jimmy and company are invited to the home of a spoiled boy billionaire - who wants Jimmy's dog.

Jimmy is recruited by the most prestigious science college in the country to be their new superstar student. But when he gets there, Jimmy becomes the unwitting target of rival student, Seymour Nimmelfarb.

Jimmy clones himself so he doesn't have to do chores.

Jimmy is desperate to get the starring role opposite dream girl Betty Quinlan in the school musical, "Macbeth in Space." But the only part he can land is the FX master backstage.

During a class trip to a rodeo, Jimmy, Carl and Sheen fall for a cute little cowgirl named Sally.

Goddard is disqualified from the Retroville Pet Show because he is not technically a real dog.

When the entire population of Retroville is accidentally hit by Jimmy's shrink ray, the Space Bandits abduct everyone with the nefarious plan of marketing and selling them throughout the galaxy as living dolls.

The kids become news anchors for a local television network.

When the old tyrant of a hall monster leaves, Jimmy is picked as his replacement.

Bored by a class documentary on mummies, Jimmy decides to take Carl, Sheen, Libby, and Cindy along with him to see the real deal.

They boys use a metabolic accelerator to make them old enough to buy a violent video game.

After a run in with a radiation belt in outer space, Jimmy, Cindy, Carl, Sheen and Libby are all endowed with super powers.

A new TV show turns everyone in Retroville into mindless and exceedingly cheerful zombies.

Jimmy is framed for a break in at the Retroville Bank. When Carl and Sheen attempt to free him from his incarceration, the three boys end up on a chain gang together.

Jimmy and Cindy are forced to collaborate on a science project involving hidden treasure.

In order to get his new chemistry set right away, Jimmy hypnotizes his parents.

Jimmy, Sheen, Carl and Captain Betty set out on a mission to capture the lake monster that has haunted Lake Retroville for at least six months.

Carl, Sheen, and Jimmy take jobs at a local burger joint. Jimmy transforms it to a fully automated restaurant that aims to please the customers and destroy the competition.

The boys travel to the Bahama Quadrangle to disprove the myth of the disappearances associated with the mysterious site.

Jimmy places a funny chip into Hugh's new Flippy puppet when he insists on using it for Career Day at school. But Jimmy soon learns that Flippy is stealing his dad's mind and has to save him before Flippy disposes of him.

To settle an argument with Cindy, Jimmy brings Thomas Edison to school.

Jimmy tries to disprove Nick's scary tale about the Phantom of Retroland.

Jimmy's teleporting goof-up leads to him switching heads with Carl's pet hamster.