Doraemon's Adventures of The SpongeBob SquarePants Movie is an upcoming film. It will appear in a near future.
A group of pirates get tickets to watch The SpongeBob SquarePants Movie from a treasure chest. The pirates then sing the "SpongeBob SquarePants Theme Song," enter a movie theater, raid it, and sit down to watch the movie.
The movie properly begins with an emergency at the Krusty Krab, complete with police helicopters and news reporters. Suddenly, SpongeBob SquarePants, "the manager," arrives in a sleek sports car. Mr. Krabs says that it started with a simple order, a Krabby Patty with cheese. "When the customer took a bite, no cheese!" Mr. Krabs starts crying, leading SpongeBob to slap him. He enters the Krusty Krab and meets a fish named Phil. SpongeBob then opens his suitcase, takes out a pair of tweezers, and puts cheese on the Krabby Patty. The day is saved, and the crowd starts cheering for SpongeBob. Their cheers soon degenerate to the sound of SpongeBob's alarm clock, and he wakes up, revealing the opening scene to be a dream.
SpongeBob is extremely excited, as today is the grand opening of "The Krusty Krab 2," and he is going to be the new manager and prepares himself for the day. Patrick Star's rock lifts up, and Patrick congratulates SpongeBob says that to celebrate, they are going to go to "Goofy Goober's Ice Cream Party Boat." SpongeBob and Patrick sing the Goofy Goober theme song, and afterwards, SpongeBob goes off to the Krusty Krab. Plankton envies Mr. Krabs, and states he tried every plan in his cabinet from "A to Y". There are actually 26 letters of the alphabet, and Plankton does not notice it at first, but Karen, his computer wife, tells him. Plankton finds "Plan Z" in the back of the drawer. He thinks it is his best plan yet. He goes outside, only to be stepped on by SpongeBob. He pulls Plankton off his shoe, and asks him if he is going to the 'grand opening ceremony.' Plankton replies, "No, I am not going to the 'grand opening ceremony'! I'm busy planning to rule the world! Ha, ha, ha!" SpongeBob does not understand this, wishes Plankton luck, then runs off again, leaving Plankton to walk away saying, "Stupid kid." Meanwhile, Mr. Krabs is preparing the grand opening ceremony of the Krusty Krab 2, which is an exact replica of the original and is located directly next-door to it, the only difference being a giant glowing "2" sign. SpongeBob rushes up to the stage to accept his promotion, but Mr. Krabs announces that Squidward is the new manager instead, much to SpongeBob's shock. Mr. Krabs tells a heartbroken SpongeBob that he is too immature and childlike to handle the task, and SpongeBob sulks away, saying "I'm ready ... depression." Patrick suddenly flies by, naked, with a SpongeBob banner in his butt, and crashes into the set, causing a fire.
Later, Plankton flies towards King Neptune's castle, as part of "Plan Z." Inside, Neptune is attempting to punish his royal crown polisher for touching his crown, but his more intelligent daughter, Mindy, stops him. The brutish and tyrannical king tries to explain to his daughter that he must enforce his power as king in order to be respected, and that she will have to do the same when she is Queen. He begins to explain the importance of his crown, and as he talks, Plankton arrives and steals it. Neptune, who is "bald," is horrified to discover that his crown is missing, Plankton having stolen it.
Meanwhile, SpongeBob is at Goofy Goober Ice Cream Party Boat brooding over his loss. Patrick arrives thinking SpongeBob is the manager, but he was told the truth about being a kid SpongeBob starts to leave, but then Patrick gets a Triple Gooberberry Sunrise, and SpongeBob comes back. Doraemon and his Friends meet and hang out with Spongebob and Patrick at Goofy Goober. They begin to eat dozens of Surprises burying the waiter in ice cream continuously saying "waiter." They become "drunk" from all the ice cream, and SpongeBob falls asleep in the restaurant, experiencing hangover-like symptoms the morning afterwards.
Meanwhile, Neptune arrives at the Krusty Krab after receiving evidence planted by Plankton of Mr. Krabs stealing his crown, which is a note, saying, "I stole your crown. Signed, Eugene Krabs." Krabs denies stealing the crown, but a message then plays on the phone of a man thanking Mr. Krabs for giving him the crown and saying that he sold it to Shell City. This call is actually from Plankton. Neptune gets frustrated and plans to burn Mr. Krabs. However, before doing that, Neptune asks if anyone has anything to say to defend Mr. Krabs, and a "drunken" SpongeBob arrives and bad-mouths Mr. Krabs for not giving him the manager job, saying, "I've worked for Mr. Krabs for many years, and always thought he was a great boss. I now realize that he's a great big jerk! I deserved that manager job, but you didn't give it to me because you said I'm a kid! Well, I am 100 percent man, and this man has something to say to you!” He blows a long raspberry and then finishes his statement, “There! I think I made my point!" Neptune burns Mr. Krabs, but Mr. Krabs plunges into a barrel filled with water. Upon realizing the severity of the situation, SpongeBob returns to his normal self and stops Neptune from killing him. Mindy convinces her father to give SpongeBob a chance to prove Mr. Krabs' innocence, and he and Patrick agree to travel to the dreaded Shell City, and return with the crown, and freezes Krabs right there until the crown is returned. Squidward panics, mostly over his paycheck not being signed. Originally SpongeBob, Patrick, and Squidward go on the trip, but the latter refuses and walked out of the Krusty Krab. Mindy, whom Patrick develops a crush on, gives SpongeBob and Patrick a magical bag of winds to return home with and warned about the trip.
With six days to retrieve the crown (there were originally ten until King Neptune and Patrick argued it down to six), SpongeBob and Patrick take the "Patty Wagon," a car shaped like a Krabby Patty. They soon reach a gas station located on the county line, where the hillbilly owners laugh at them, finding the duo and their vehicle stupid. They tell SpongeBob and Patrick that they would not last for ten seconds over the county line. When SpongeBob and Patrick cross the line, a thug immediately steals their car. SpongeBob and Patrick then realize that they lasted for twelve seconds, and begin laughing at the hillbillies, who are dumbfounded by their idiocy, as they continue on foot. Later, they find their car parked at the "Thug Tug," a bar for tough, muscular fish. SpongeBob has Patrick distract the thugs so he can get the key. (Unfortunately, Patrick just said, "I have to go to the bathroom," making SpongeBob unsuccessful, and getting his hands dirty in the process.) SpongeBob heads for the bathroom to wash his hands, and when he uses the soap dispenser, it produces bubbles. SpongeBob and Patrick begin having a "Bubble Party," but one bubble floats over to the leader of the "Thug Tug," who reminds the other bar patrons of the policy that all "Bubble Blowing Babies" will be severely beaten. The leader goes on a "Bubble Blowing Baby Hunt" by turning on the Goofy Goober Theme song, where the first person to start singing is determined to be the culprit. SpongeBob and Patrick struggle not to start singing, then the owner starts singing it to SpongeBob and Patrick, causing SpongeBob's eyes to water and Patrick to start melting, and they are only saved when Siamese Twins burst out in song. The other thugs begin beating them, allowing SpongeBob and Patrick to steal the key amid the confusion and depart.
By the following day, Plankton, with Mr. Krabs incapacitated, obtains the Krabby Patty Secret Formula, and begins serving Krabby Patties at the Chum Bucket. He stole the formula by sneaking by Mr. Krabs while he was frozen, going into his office, entering the safe code, and stealing the formula. Plankton starts selling Krabby Patties at the Chum Bucket, along with free bucket helmets. He has also learned about SpongeBob and Patrick are trying to get the crown back and hires a professional mercenary named Dennis to ensure that SpongeBob and Patrick do not reach Shell City. The next day, Squidward sees that everyone is wearing helmet buckets. After a woman tells him that Plankton is giving them away free with the Krabby Patties, he goes to confront Plankton. Squidward figures out that Plankton was the one who stole King Neptune's crown to get the Krabby Patty formula. He decides to report him to King Neptune, but before he leaves the Chum Bucket, Plankton activates a mind-control device, revealing that the bucket helmets are actually mind controlling helmets. Squidward tries to escape, but the enslaved citizens corner and capture him, taking down the last opposition to Plankton in Bikini Bottom and transforms the city into "Planktopolis." Doraemon, Noby, Ichi, Bulltaro, Daku, Sneech, Big G., Gus Turner, Robotboy, Tommy Turnbull, Dora-Rinho, Dora Kid, Dora-Nichov, Dora Med, El-Matadora, Phineas, Ferb, Rudolph, TJ, Vince, Gus, Mikey Wang Dora, SpongeBob and Patrick are traveling through a field of skulls, laughing over their victory at the Thug Tug. Spinelli, Gretchen, Sue, Chiko, Lola Mbola and Romi stay and take care of King Neptune. They see an Ice Cream Stand, but when SpongeBob goes to order, the old woman running the stand is revealed as the tongue of a monstrous Frogfish using the Ice Cream Stand as bait. The Frogfish chases SpongeBob and Patrick, eventually driving off a cliff and getting out of the car just in time. The Frogfish is lured off the edge, and subsequently is eaten by an even larger beast, which is a gigantic sea serpent that appears from the trench. Unable to pass through a monster-filled trench, SpongeBob decides to give up and accepts the fact that he and Patrick are just children. However, Mindy arrives and shows them what has happened to Bikini Bottom while they were gone, and gives them fake mustaches in the form of seaweed, convincing them that they are now men. SpongeBob and Patrick pass through the trench without fear (singing, "Now That We're Men"), but meet up with Dennis on the other side. He rips off their fake mustaches and explains to them that they are not really men, and prepares to kill them by crushing them under his boot. However, before he can do so, a gigantic boot crushes Dennis, belonging to a monstrous scuba diver known as "The Cyclops," who abducts SpongeBob and Patrick to the surface.
SpongeBob and Patrick wake up in a goldfish bowl filled with freshwater and sedimentary pebbles. They see the Cyclops making "knick-knacks" from "dead" sea creatures, much to their horror, and are soon taken out of the bowl and put on a table under a heat lamp, and start to dry up. Soon, SpongeBob laments that they have failed, and that Bikini Bottom will remain under Plankton's mind control, Mr. Krabs will be executed, and they too will die. Patrick points out a sign reading "Shell City: Marine Gifts and Sundries." SpongeBob realizes that they are in Shell City, which is in fact a gift shop. They see the crown, and SpongeBob then realizes that they did at least make it to Shell City, and did pretty well for "a couple of goofballs." They shed a tear and begin singing the Goofy Goober song, just as they shrivel up. The faces get smaller, Patrick's body shape gets round bevel edges and Spongebob's legs and arms roll up into the sleeves. "Goofy, Goofy, Goober, G--," they stop, then die and become real with their faces being faded away. Back in the movie theater, all the pirates mourn the loss of SpongeBob and Patrick, but a talking parrot points out that the movie is not over yet and they continue watching it. The "Tear of the Goofy Goober" slides down a wire into the power outlet, causing it to short-circuit and let out smoke, which rises up and activates the fire suppression sprinkler system, causing all the sea creatures to reanimate and the table with the lamp to cool off. As the water drips from the system, Spongebob and Patrick first get saturated colors and then they become cartoon again upon resurrection. As the sea creatures (which include a mariachi band playing a song from Mexico) beat up "The Cyclops," SpongeBob and Patrick grab the crown and carry it out to the beach. There, SpongeBob reads the manual of the Bag of Winds, and Patrick accidentally releases it, leaving them stranded on the beach. However, David Hasselhoff arrives and carries them across the ocean on his back.
On the way back home, the big boot belonging to the same diver that kidnapped them, rises up sea, and an angry Dennis emerges from below it, intent on finishing the job Plankton gave him and goes after Patrick and SpongeBob with his dagger in hand (much to Hasselhoff's discomfort). He corners SpongeBob, who attempts to reason with Dennis (by bribing him with five Goober dollars); Dennis is uninterested, so SpongeBob proceeded to more offers - including a bubble-blower that sends a stream of bubbles to Dennis's eyes, blinding him and making him even angrier. However, just as he is about to stomp on them with his boot, he ends up being knocked into the ocean by a floating sailboat. As the duo arrive over Bikini Bottom, King Neptune is about to execute Mr. Krabs, but is being "stalled" by Mindy, but Neptune just thinks so. Hasselhoff opens his pectoral muscles, prepares countdown, and shoots the duo down into Bikini Bottom at fast speed, where they crash through the roof of the Krusty Krab, the crown deflecting the trident blast that nearly kills Mr. Krabs, and ends up burning Hasselhoff. Unfortunately, that does not stop Plankton, as he dumps a King-sized Chum Bucket Helmet on Neptune, also putting him under his control. As Plankton's minions surround the heroes, SpongeBob realized that Plankton didn't care whether Krabs should be fried or not he just wanted the power of the seas under his control, having used the theft of the crown to lure Neptune into the trap, thus he cheated. Plankton doubts to him to cheating, and he states to him that he is an evil genius and SpongeBob is just a kid---a stupid kid. SpongeBob makes a speech about being who you are, before transforming into a wizard and breaking out into a bizarre rock version of the Goofy Goober theme song (based on the Twisted Sister's I Wanna Rock) using his electric guitar's laser beams to destroy all the brain-control buckets with and Doraemon and his friends will sing Goofy goober Rock with Spongebob except the girls.
Plankton is trampled before he can escape, and the cops put him in a little cage and take him away. Neptune reaches an understanding not only with Mr. Krabs, but also with his daughter, and thanks SpongeBob and Patrick. He then turns to leave, but Mindy reminds him about Mr. Krabs. He unfreezes Mr. Krabs, turning him into a fat little boy. Neptune then reveals that he had his trident set to "Real Boy Ending". He then turns Mr. Krabs into a crab again. Squidward suggests to SpongeBob that he has learned that he does not really need to be the manager of the Krusty Krab 2, but SpongeBob eagerly takes the position anyway. Images shown throughout the end credits shown the sole two differences between the job of manager and fry-cook is that there is a giant hat with the word manager imprinted on it and an extra cent in his paycheck. Nonetheless, SpongeBob takes on the role of manager of the Krusty Krab 2 with great pride, as the film signifies the conclusion of the franchise's story.
Back in the theater, the usher tells the pirates to leave the theater so she can clean up the mess they left.