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 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 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 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.

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

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

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.

Moon Girl fights to save the LES from changing.

When Devil Dinosaur eats a dangerous Moon Girl gadget, Lunella and Casey must shrink themselves to retrieve it.

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

When The Beyonder gives an arcade machine the ability to grant wishes, Lunella is pumped to use it.

When being around the brilliant Hot Tomatoes leaves Pops feeling insecure, he dabbles in an elixir that makes him smart.

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

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.

When Moon Girl and The Beyonder become stranded on a desolate alien planet, the two set out to find a rumored black hole in hopes of getting home.

When Pops' rivalry with former best friend and skate partner Vernell threatens to ruin Roller Jam, Lunella meddles in their beef to squash it.

Moon Girl’s rivalry with a new teenage super-foe, Kid Kree, threatens her budding friendship with his human alter ego, Marvin.

Eager to bond with her dad, Moon Girl takes James on a ride-along.

Devil Dinosaur gets two birthday parties.

Moon Girl gets into the children's party business.

When Lunella and Devil Dinosaur spend the weekend apart after a disagreement, Devil Dino gets mixed up with a rag-tag group of ex-Super Hero sidekicks.

When Pops fosters a mysterious stray dog and enters him into a dog show, a paranoid Lunella is convinced the creature is an evil alien who intends to sabotage the event.