Scooby-Doo and the Ghoul School

Scooby-Doo, Shaggy, and Scrappy arrive at Miss Grimwood's Finishing School for Girls and are hired as gym teachers. They quickly realize the school is actually home to daughters of various paranormal beings. The students include Sibella, Elsa, Winnie, Phantasma, and Tanis, along with a host of odd residents. The trio, though nervous, decide to stay and take on their new roles.

The school features Sibella, daughter of Count Dracula; Elsa Frankenteen; Winnie, daughter of the Wolfman; Phantasma; and Tanis, daughter of a Mummy. Other unusual residents include a disembodied white hand, an octopus butler, a two-headed shark, and a helpful spider named Legs. The atmosphere blends danger with whimsy as the girls settle in.

During the annual volleyball match against the Calloway Military Academy, the boys rig the ball with a remote control. Scooby accidentally swallows the remote, allowing the girls to win. The event showcases the girls’ resourcefulness and foreshadows tensions with the cadets.

On Halloween night, the girls' fathers attend an open house party at the school. The gathering is warm and friendly, helping the families feel welcome. Before leaving, they warn Shaggy and Scooby to protect their daughters at all costs.

Power-hungry witch Revolta and her minion the Grim Creeper plot to kidnap the girls. They hypnotize Shaggy into taking the group on a field trip to the Barren Bog. Matches tries to accompany them but is told to stay behind.

The Calloway Cadets become trapped in quicksand during the bog excursion. Elsa and Tanis rescue them, earning their respect and showing that the students can act bravely under pressure. The rescued Cadets realize the girls aren’t the threat they feared.

Revolta begins creating a potion that will turn the girls evil at the stroke of midnight. Spider bats slowly capture the girls for her ritual. Scooby, Scrappy, Shaggy, and Matches rush to catch up to Revolta's castle.

Inside the castle, the gang confronts a Mirror Monster that can imitate those who gaze into its mirror, as well as a giant Well Dweller. Revolta herself appears as part of the siege on the castle's defenses. The heroes press forward despite the terrifying apparitions.

When the clock strikes midnight, Revolta administers the potion through hairdryers, but Scooby and Shaggy manage to interrupt and reverse its effects. Elsa throws Revolta's wand into the potion, causing a massive explosion. The villains' plot collapses as chaos erupts.

The Cadets arrive in a pedal-powered helicopter to rescue everyone from danger and fly them to safety. Revolta swears vengeance as she escapes, leaving the school in relieved laughter and celebration. The rescue marks a turning point for the school community.

A party is held to celebrate Revolta's defeat and the bravery of the Grimwood girls and their allies. The Cadets join in the festivities as the school community bonds over the near disaster. Gifts and cheers mark the joyous aftermath.

As the next year approaches, new monsters enroll their daughters at the school, shocking Shaggy and Scooby. They flee in terror, but all four girls wave goodbye from the grounds. The trio concludes with a final werewolf howl as they drive off into the night.