SpongeBob SquarePants and the Ghoul School

 is a 2004 American animated film. It is produced by Nickelodeon as part of the Nickelodeon Superstars 10 series. It is released in October 3, 2004.

Plot:
SpongeBob and his friends are on their way to Mrs. Seasmith's Finishing School for Girls, where they have been hired as gym teachers.

Synopsis:
While on the road, SpongeBob, Squidward, Sandy, Patrick, Mr. Krabs and Pearl discuss the new job Squidward has accepted as a gym teacher. SpongeBob is reluctant about his decision because of the eerie weather and location.

As they pull up to a school they realize that it is the neighboring Jacobs Military School. The Seasmith School SpongeBob has a contract with is much more frightening and spooky. SpongeBob gets flung across the moat to the door and is the first to enter the school and meet their pet dragon Fiery who sprays fire at SpongeBob.

SpongeBob and his Friends enter the Seasmith school as a drawbridge lowers and they are able to walk across. They meet Fiery and Mrs. Seasmith, discussing Squidward's new job and contract. They also meet a floating hand which helps them with their luggage. One by one the girl-ghouls are met and introduce themselves to them. Selena, Anne, Elsa, Melanie, Gay, Rebecca, Becky, Millie, Wendy, Linda, Paula and finally Susie. SpongeBob and his Friends by this time are already trying to leave the school and terminate Squidward's contract. Squidward who is terrified, mentions how the "girls" are actually girl-ghouls.

The girl-ghouls discuss their problem of not ever winning the volleyball championship against their rivals the Jacobs Cadets next door and SpongeBob and his Friends agrees to stay and help, starting with early morning exercises the following day. SpongeBob starts noticing things not right about the Seasmith school such as a pet piranha in the goldfish tank. Early morning exercises start with ballet while the neighboring Jacobs Cadets are beginning their warm-up exercises as well. The Cadets spy SpongeBob and his Friends with a telescope and take note of the new coaches at Seasmith. They soon loose their volleyball to Fiery after a cadet serves the ball hard and loses it. The cadets aren't able to practice for a while.

Continuing morning exercises, the Seasmith girls go for a morning jog and meet up with Fiery who is burying the cadet's volleyball. The Seasmith girls stop for rotten apples while SpongeBob and Squidward stick out their tongues in disgust. Meanwhile, the Jacobs Cadets are working on a water balloon bazooka which they plan to use to retrieve their volleyball but Fiery ends up returning it anyway before they get it working correctly. The gangs meets giant fly-traps in the garden as well as all the rotten food in the garden which the Seasmith girls like. In the garden SpongeBob sees crystal balls which have been planted their to spy on the Seasmith girls, the first clue that they are being watched by Discoloration, an evil sorceress who wants to use the girls to become "the most powerful witch in monster-dom".

Colonel Jacobs visits Seasmith School in order to set the time for their annual volleyball tournament. Mrs. Seasmith offers him fungus fudge and toadstool tea which he eats and drinks in disgust as he comments that it tastes moldy. SpongeBob and his Friends is introduced to Colonel Jacobs and they plan to play at 1400 hours which Patrick clarifies as 2:00 p.m. The girl ghouls warm-up with "scare-o-robics" and "deep shrieking" exercises and scare the Jacobs cadets with the loud screaming. Meanwhile the cadets are warming up with standard stretches and pushups. Colonel Jacobs gives the cadets a short pep-talk and tells them that they've "gotta win".

The girls finish their exercises with loosening their muscles and a short swim in the Seasmith moat. Fiery blow-dries them off right before the match. Mrs. Seasmith calls Smith over to repair the Seasmith net and boundary lines. Soon the game ready to begin!

Linda begins the game with a couple good serves. Soon they are at 10-10 tied. Then Jacobs takes the lead after Paula goes through the net. Next, Susie serves the ball and scores a point, Seasmith now taking the lead. Jacobs implants a control device into the volleyball so they can control how the ball moves. They use a remote to make Susie's serve look bad and they take control of the ball. Jacobs takes the lead again until Sandy accidentally swallows the ball's remote control and squirts ketchup at the cadet who was serving. Seasmith gets the next serve by Wendy and they catch back up to Jacobs. Discoloration is shown to be watching the game in anticipation. Wendy spikes the ball off the back of Paula and Selena gives the final serve. The remote control in Sandy's belly gets triggered and the ball moves back into the Jacobs's side of the court. Seasmith wins and Susie gets the trophy for her mummy case.

The Seasmith girls start setting up a halloween party, excited that they have won the annual volleyball game. Mrs. Seasmith bakes brownies and caterpillar cookies. The Seasmith girls talk about how their parents plan to attend the party. SpongeBob and his Friends get scared as the monsters begin to arrive and they go hide in a secluded room. Discoloration watches the monsters arrive through a crystal ball. The parents meet SpongeBob and his Friends anyway and believe they run away from them simply because they are gym teachers trying to stay in shape. Soon they've all met and Tanis's father thanks them for "making Susie feel like a winner".

The Seasmith girls present gifts they have made for their parents such a lemon juicer for werewolf parents, a bat-robe for vampire parents and a portable shockman for Frankenstein parents. Discoloration watches the whole time through a crystal ball, saying that "soon the party will be over". Paula plays a song with the floating hand as an accompaniment. The parents leave after the party is over.

Discoloration and Underfloor plan to hypnotize Squidward. They send a bat out to go find Squidward and hypnotize him. SpongeBob sees the bat as it tries to enter but Squidward doesn't see it. It hides in the window shade and later above Squidward's bed. The bat weaves webbed-headphones which Discoloration uses to talk to and hypnotize Squidward. She tells Squidward to take the Seasmith girls to the Lurky Swamp for a jog, to which he accepts.

The following morning, the Jacobs Cadets wake to a homemade alarm clock and discuss their upcoming field trip to the Lurky Swamp, the same day Squidward is planning to go. Meanwhile, the Seasmith girls all get ready for their field trip as well. Mrs. Seasmith waves goodbye.

At the swamp, Discoloration' sidekick the Underfloor awaits to capture the Seasmith girls. Squidward isn't in a trance anymore but is still excited to go for a jog at the bog. Wendy is the first to meet up with Underfloor and his bats. Wendy dodged the attacks and did not get brainwashed. Underfloor was worried Discoloration was gonna kill him.

Patrick asks Squidward how he thought of going to Lurky Swamp. Squidward can't recall except that it might have been a dream. They don't watch where they are going and soon all then get stuck in a swamp full of alligators. SpongeBob and his Friends realize that the area is much more dangerous than they'd previously thought. Selena transforMrs into a bat in order to save them from the alligators. Meanwhile, the Jacobs Cadets are out hiking nearby and fall into quicksand. Susie and Linda see the boys sinking and help them out of the quicksand with a tree trunk.

SpongeBob and his Friends begin to look for the girls, realizing that they haven't seen them around. Selena sees the bagantulas and asked Anne for some help. SpongeBob runs into Underfloor and Fiery saves him with his fire breath as Underfloor runs off.

The rest of the girls meet up with Wendy and helped them fight off the bagantulas. Underfloor retreated and reported back to Discoloration. Discoloration was furious at first, but then, she had an evil plan. After hearing Discoloration' evil laughed, the Jacobs Cadets tell SpongeBob and his Friends of the supposed way to defeat Discoloration, by letting her fall to her death.

After entering by way of Gay's tail as a key, the gang splits up to search the place. They were suddenly double-crossed by Underfloor who led them into a trap. Underfloor warns them of the BB-Rex creature who lives in the well tunnel. The creature lurches toward them.

Pearl starts a ball game with the BB-Rex and tricks him into making a ladder for them to escape the well tunnel. Underfloor changes SpongeBob into a frog as a last-ditch effort to scare them into conformity. SpongeBob as a frog, runs for his life, while the Seasmith Girls made a plan to get rid of him. Underfloor was tricked into falling down the well and eaten by the BB-Rex. Anne changes SpongeBob back to normal. Discoloration appears and confronts SpongeBob and his Friends, Jacobs Cadets, and Seasmith Girls, changing into a dragon.

After confusing Discoloration by banging several different gongs, Pearl's presence is revealed to Discoloration. Selena tackles Discoloration to the ground, allowing SpongeBob and Pearl enough time to escape, but the dragon chases them to a statue across a pit of lava. Discoloration is killed within the rock, and it plummets onto a large stone in the lava below.

The Jacobs Cadets return back up in the nick of time to save them all by flying away in the homemade helicopter. Back at Seasmith, everyone has thrown a huge party to celebrate the success. Patrick does a rap. Soon Squidward and SpongeBob are introduced to a new set of students and they run away in terror. Patrick says goodbye to Fiery and she, Mr. Krabs, and Pearl follow. As SpongeBob and his Friends walk away, the Seasmith girls wave goodbye from the porch of the school. SpongeBob and his Friends howl a loud Seasmith goodbye and walk off into the moonlight.