Friendship Games out of Water

Plot
After the discussion of an incident where Sunset Shimmer chases after a mysterious hooded girl scanning the CHS statue, the story suddenly shifts as a book read by a pirate known as Burger Beard, reading about the endless fights between The Krusty Krab & long-time rival The Chum Bucket due to the former's secret formula for their top menu item, the Krabby Patty. One time, however, the formula disappears just as Plankton, owner of The Chum Bucket, tries to take away the formula from SpongeBob, fry cook of The Krusty Krab.

Plankton is chased by The Krusty Krab's customers, but is saved by SpongeBob, who was with him when the incident happened. Soon, Bikini Bottom degraded into an apocalyptic wasteland, with everyone but Karen, Plankton's wife, turning on him & SpongeBob. Burger Beard ends the story there, but the listening seagulls want it to continue, & in a fight, rip off the page with "The End!" written on it, landing in the ocean & covering the treedome of the city's resident squirrel, Sandy Cheeks, who then goes insane trying to find out what it means.

Back at CHS, a pep rally takes place, and Rainbow Dash suddenly "ponys up" without her guitar shortly after. Vice Principal Luna tells them to ensure they don't use their magic as to not cheat. Sunset is tasked with investigating her friends' magic, & writes a letter about it to Princess Twilight Sparkle. Meanwhile, the Twilight Sparkle of the human world is convinced by Principal Cinch to join the Shadowbolts to compete with CHS, with the reward of applying for Everton. Meanwhile, SpongeBob & Plankton travel back in time to retrieve the formula before it disappeared. In their quest, one of their destinations was in the middle of space, where they meet Bubbles, who attacks them after the duo screw-up with watching Saturn & Jupi-TAIR while he took a break. They escape before he could hurt them any further. Burger Beard, back on shore, with the formula in hand, starts his food business.

Crystal Prep is welcomed into CHS, where Sci-Twi meets the Rainbooms, & is confused when she finds out they know her. Pinkie clarifies that the Twilight they're meeting is the Twilight from this world, also considering she looks different. Her amulet causes problems, however, as the portal to Equestria is rendered useless. Back under the sea, Sandy tells everyone of her conspiracy theory when SpongeBob & Plankton return with the formula, which was actually a hate letter from Plankton. The townsfolk plan to sacrifice them, with Plankton baselessly blaming SpongeBob, who suffers a breakdown until he stops. SpongeBob then volunteers to be sacrificed, but they smell Krabby Patties before they can go through with it.

They all go oversea, and with the help of Bubbles (who was actually sick of his job), gain the ability to breathe in land. Once they emerge from a sand castle, they're smacked away by a little boy, all the way to CHS, where they meet the Rainbooms & Shadowcolts. That's when Pinkie Pie starts a welcoming party for Crystal Prep & the Bikini Bottomites. However, when Pinkie ponys up, Sci-Twi's amulet takes her magic away. Principal Cinch then gives a speech on how Crystal Prep will win the games once again, which is proven later on, although the Shadowcolts are barely excited.

Later, Sci-Twi accidentally drains Fluttershy's magic, & after a Equestrian jackalope appears gives Spike the ability to talk. As the Friendship Games continue, an argument between Sunset & Sci-Twi ensues after Rainbow Dash's magic is taken from her. But at the same time, the Bikini Bottomites find Burger Beard, who banishes them all to Pelican Island with his book. At the final event of the Friendship Games, Sci-Twi is forced to unleash their magic for them to win, transforming into Midnight Sparkle. Burger Beard is also there too as a sponsor selling Krabby Patties. But by then, the townsfolk of Bikini Bottom return as superheroes, accidentally leaving Plankton behind.

After confronting Midnight Sparkle, Sunset restores everyone's magic & becomes Daydream Shimmer, & while she battles Midnight, the Bikini Bottomites & Rainbooms take on Burger Beard. Daydream successfully defeats Midnight, but the former also gives her her hand, which she accepts. Even when Sunset & Sci-Twi come to help, Burger Beard proves too powerful for them, & gets away with the formula. However, before he leaves, he is stopped by Plankton, now a muscular superhero known as PlankTON. The pirate splatters hot sauce on his eye & tries leaving, but the Rainbooms unleash the Elements of Harmony, & the Bikini Bottomites use their powers to stop him from leaving. He is especially disoriented by PlankTON, who, together with SpongeBob/Invincibubble blows into the latter's bubble wand, enrapturing Burger Beard in a wave of bubbles. Once the formula is retrieved, PlankTON kicks Burger Beard all the way to Bikini Atoll. The former gives back the formula to Mr. Krabs, as they celebrate with the games ending in a tie, our heroes putting their hands in the middle, Sci-Twi enrolling for CHS instead, & Invincibubble singing.

They have an outdoor picnic shortly after, but that's when Princess Twilight FINALLY arrives, meeting her counterpart & the Bikini Bottomites. Once all is settled, the latter group says goodbye to the Rainbooms & returned to Bikini Bottom, where things go back to normal, including Plankton reverting back as Mr. Krabs' rival. After being turned down earlier, Burger Beard & the seagulls sing the SpongeBob theme song, with Bubbles interrupting with a rap battle before they finish. As the credits roll, pictures of students, teachers, & our undersea heroes spending good times together, as well as the latter group dancing to a mashup of "Right There in Front of Me" & "Squeeze Me". After the credits have finished rolling, SpongeBob's pet snail Gary continues chasing Plankton like he did earlier.

Cast

 * Tom Kenny - SpongeBob, Gary, Agreeable Mob Member, Waffle
 * Rebecca Shoichet - Sunset Shimmer, Sci-Twi (singing voice)
 * Mr. Lawrence - Plankton, Plankton Robot, News Anchor Fish, Mob Member
 * Tara Strong - Sci-Twi, Twilight Sparkle
 * Antonio Banderas - Burger Beard
 * Clancy Brown - Mr. Krabs
 * Ashleigh Ball - Rainbow Dash, Applejack
 * Andrea Libman - Pinkie Pie, Fluttershy, Sweetie Drops
 * Tabitha St. Germain - Rarity, Vice Principal Luna
 * Bill Fagerbakke - Patrick, Male Fish, Eager Customer
 * Rodger Bumpass - Squidward, Doctor, Angry Mob Member #2, Doughnut, Squidasaurus Rex
 * Cathy Weseluck - Spike
 * Iris Quinn - Prinicipal Cinch
 * Carolyn Lawrence - Sandy
 * Matt Berry - Bubbles
 * Sienna Bohn - Sugarcoat
 * Sharon Alexander - Sour Sweet
 * Kelly Sheridian - Indigo Zap
 * Britt Irvin - Sunny Flare
 * Shannon Chan-Kent - Lemon Zest, Pinkie Pie (singing voice)
 * Nicole Oliver - Prinicipal Celestia
 * Jill Talley - Karen, Harold's Wife, Ice Cream Cone #2
 * Britt McKillip - Dean Cadence
 * Andrew Francis - Shining Armor
 * Eric Bauza, Tim Conway, Eddie Deezen, Rob Paulsen, Kevin Michael Richardson, April Stewart, Cree Summer, Billy West - Seagulls
 * Paul Tibbitt - Kyle, Helpful Angry Mob Member
 * Kazumi Evans - Rarity (singing voice)
 * Carlos Alazraqui - Seagull, Dead Parrot
 * Nolan North - Seagull, Dead Parrot, Pigeon Cabbie
 * Vincent Tong - Flash Sentry, Bus Driver
 * Pat Pinney - Painty
 * Nice Peter - Seagull, Painty (rap voice), Surfer Dude #1
 * Epic Lloyd - Seagull, Surfer Dude #2

Songs

 * Friendship Games - Rebecca Shoichet, Ashleigh Ball, Andrea Libman, Shannon Chan-Kent, Kazumi Evans
 * Thank Gosh it's Monday - Tom Kenny, Bill Fagerbakke, Clancy Brown
 * CHS Rally - Ashleigh Ball
 * What More is Out There? - Rebecca Shoichet
 * Teamwork - Tom Kenny, Mr. Lawrence
 * Squeeze Me - N.E.R.D.
 * ACADECA - Rebecca Shoichet, Tom Kenny
 * Unleash the Magic - Iris Quinn, Rebecca Shoichet
 * Best Day Ever - Tom Kenny, Ethan Slater
 * SpongeBob SquarePants Theme Song - Pat Pinney, Devin & Caryn Johnson, Sara Paxton, Camryn Walling, Harrison Fahn, Elan Garfias
 * Rap Battle - Matt Berry, ERB, Pat Pinney
 * Squeeze Right in Front of Me - Rebecca Shoichet, N.E.R.D, Tom Kenny, Mr. Lawrence, Ashleigh Ball, Andrea Libman, Shannon Chan-Kent, Bill Fagerbakke, Clancy Brown, Kazumi Evans, Carolyn Lawrence
 * Patrick Star - N.E.R.D.
 * Sandy Squirrel - N.E.R.D.