Since Jimmy's a scientist, he has more important things to do than pick up his pants - like invent a device that'll do that chore for him. But when the nanochip develops advanced brainial capacity, Jimmy's pants lead an attack on the city of Retroville!

Jimmy is tired of being a genius, so he decides to drain his brain to normal capacity. But when a big meteor heads straight for Retroville, who will save the day?

Miss Fowl's class has a candy-selling contest, with the grand prize being a trip to Retroland! To beat Cindy in the contest, Jimmy invents a robot programmed to sell candy no matter what.

In his lab, Jimmy constructs the perfect little brother he never had, "Brobot".

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