Jimmy offends his cartoon friend, Tux, after he refuses to use the penguin's jokes in a school talent show.
An evil principal obsessed with spitballs drives a wedge between Jimmy and Craig's friendship, and threatens to kick Robin out of school. Meanwhile, Crocco shocks Golly when he tells him he's not his best friend.
Yancy has a sleepover and Robin shows up which upsets Jimmy. Meanwhile, Jimmy's dad takes a space joyride and Dolly loses touch with her feminine side.
Jimmy becomes the school mascot by assuming Crocco's look, but it soon changes his behavior and he has to get out of it. Elsewhere, Yancy spends a day at work with her mom.
Jimmy thinks he sees ghosts in an attic classroom, which Craig spots as a moneymaking opportunity. Elsewhere, Sonny hatches a new plan to get into Jimmy's brain.
Jimmy and Robin skip school to ride a rollercoaster. Also, Sonny creates a robot version of Jimmy.
A bully targets Jimmy and tries to steal Robin. Meanwhile, Sonny takes a baseball player's brain.
Dolly helps Jimmy learn to skate and Sonny gets a new job.
A reporter for the school newspaper does a story on Jimmy, but she's secretly investigating Craig and his bootleg soda operation. Meanwhile, Yancy gives Sonny romantic advice.
Jimmy and Craig must get out of detention to prevent Robin from learning Jimmy's most embarrassing secret.
After Robin blames Jimmy for ruining her rock opera, she looks for revenge during the school's annual game of Ambush.