Having been found to have only been activated for five years, the school system declares that Jenny has to be moved into a grade level that corresponds to her "age." Jenny finds herself being forced to adapt to kindergarten.

With Misty hanging in Tremorton and doing her part in keeping the town safe (though not for free), Jenny decides to leave the superheroics to her and starts to slack off. But when Misty's mercenary habits clash with Jenny's views on protecting the innocent, fisticuffs break out between the two. What's going to become of their friendship?

One of Mrs. Wakeman's old creations, a robot puppet named "Li'l Acorn", tries to make Jenny his bride.

Jenny, Brad, Tuck, and Sheldon end up stranded on a deserted island inhabited by hostile robotic clones of historical figures. To make matters worse, Jenny's auxiliary power is about to run out! Featuring Uncle Wizzly, based on the famous creator of the Wizzly theme parks.

After Nora's electrics address filer goes on the fritz, Jenny invites her distant aunt over to visit, but quickly learns that she and her sister Nora Wakeman don't quite see eye to eye.

Sheldon is recruited to become a sort of secret agent, and stumbles onto a supposed plot to destroy every last robot in Tremorton.

The Space Bikers have managed to rebuild Jenny into a motorcycle, and now she and Tuck are en route to their hideout to demand them to change her back!

Vexus is back, and with a new look. Having paired up with Brit and Tiff, the ex-Cluster Queen is becoming quite popular in school, to the point where even the Crust Cousins can't compete.

After destroying a series of asteroids that threaten to destroy the Earth, Jenny returns to earth, bringing with her a dust that severely alters the characteristics of her close friends.

Brad is getting married, but not by choice. The Space Bikers want poor Brad to get hitched to Tammy. But does Brad really want to be rescued?

Skyway Patrol wants Jenny to pay for repairs to the city due to her fights, and now Jenny is on a desperate job hunt.

Sheldon tries to make Jenny jealous by paying Pteresa to be his girlfriend.

Jenny, Brad, and Tuck can't seem to agree over the rules of a board game. But when the boys tag along on Jenny's mission to a garbage dump asteroid, they run into Vexus, Smytus, and Krackus who are stuck in the asteroid. The ex-Cluster Queen is looking to drain Jenny of her energy, but she and her henchbots can't agree on what to use the power for.

Jenny unwittingly dishonors a Japanese vacuum robot while on a mission to Tokyo, and she must restore the robot's honor.

At the Invention Convention, Professor Wakeman's latest robot goes haywire. Soon after, all the previous XJ robot models begin to attack as well. It's up to Jenny and her mother to find out why.