When brilliant, altruistic Lunella Lafayette accidentally brings a dinosaur to the Lower East Side, she finally has the brawn to match her brains and protect her community.

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.

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.

When Devil 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.

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

Moon Girl becomes the face of a new initiative to revitalize the Lower East Side, but the effort starts to drastically change her neighborhood for the worse.

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.

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