When Lunella finds a nasty comment on her Moon Girl social media page, her fixation on the troll threatens to take over her life.

When Lunella runs the rink for a night, she agrees to Casey's get-rich-quick scheme, which threatens Moon Girl’s reputation and her family's beloved business.

When Lunella loses a game of chess against a supercomputer, her obsession with winning drives the frustrated computer to program every device in the school to attack her.

When Lunella creates a chemical to change her hair, she accidentally turns her mane into a vengeful villain that vows to ruin her.

The Beyonder gloms onto Lunella to learn about humanity, just as she's struggling to win a big science competition.

When Lunella seemingly gets hurt and is stuck in bed, Casey must step in as Moon Girl for the day.

When Devil Dinosaur gets jealous of sharing Lunella with her class hamster and accidentally sets the animal free, he must search New York City to bring the furry friend home.

Lunella creates a device that allows her to fast forward through mundane chores and tasks, but she struggles to handle the unexpected side effects.

Lunella tries to overcome her awkwardness about fitting in at a slumber party by creating a mind-reading device but accidentally switches brains with Devil Dinosaur.

Moon Girl fights to save the LES from changing.

Hoping to help Casey have an epic bat mitzvah, Lunella makes an appearance as Moon Girl, which ultimately brings out the worst in Casey and causes a rift in their friendship.

Feeling insecure about his size, Devil convinces Lunella to create a potion to make him temporarily small.

Lunella must confront her childhood fear, the Coney Island Funhouse, to save Mimi from The Beyonder.

Lunella uncovers the history of the Original Moon Girl as she struggles to thwart a powerful villain's plan to use her portal for evil.

Moon Girl faces her greatest challenge yet and puts everything on the line.