The Overlord Unleashed

The Overlord Unleashed is a crossover film based on My Little Pony: The Movie and the first installment of the Overlord Unleashed trilogy.

Summary
With the entire universe in great danger, it's entirely up to Po, SpongeBob SquarePants, Twilight Sparkle and their friends to team up with the Ninjas of Ninjago and the Eight Warriors of Chima to defeat the Overlord from shrouding the universe in eternal darkness.

The Friendship Festival/SpongeBob, Po and their friends joined in the fun
Our story begins in Equestria, the Friendship Festival has begun. Soon, SpongeBob SquarePants, Patrick Star, Sandy Cheeks, Squidward Tentacles, Mr. Krabs, Plankton, Po, the Furious Five: Tigress, Viper, Monkey, Mantis and Crane, Shifu, Cheng Ru, Storming Ox, Croc, the Soothsayer, Li Shan and Mr. Ping were enjoying the fun of it happily.

Shifu Cheng Ru and Li Shan greeted the Princesses of Equestria
When everyone arrived in Canterlot, Shifu, Cheng Ru and Li Shan greeted Princess Celestia, Princess Luna and Princess Cadance for the very special occasion in Equestria as well as Twilight Sparkle and her friends greeted them.

Celebrating a Banquet in honor of the Alliance of Friendship/Begin a toast
At the Castle of Friendship, there was a huge banquet in honor of the Alliance of Friendship formed by Mumfie. At last, a toast to their heroism has been made as they raise their glass.

Flurry Heart begins to like Po/Forming a Peace Treaty to their Realms
Later, Flurry Heart was beginning to like Po for being cuddly. Then, he and Viper started playing with her along with Mantis as Tigress begins to go soft on her. Then, Shifu, Cheng Ru and Li Stand formed a peace treaty to their Realms to the Leaders of Equestria.

The Overlord has returned/Creating the Mean Six out of pure darkness
But further in the darkness, the Overlord awakens as he gathered General Kozu, General Cryptor, Clouse, Acronix, Krux, Pythor P. Chumsworth, and the Dark Tribe Leaders of the Scorpion, Bat and Spider Tribes, Scorm, Braptor and Spinlyn. Then, the Overlord created the Mean Six out of pure darkness and opposites of the Elements of Harmony Twilight Sparkle and her friends possess.

Storm over the Castle of Friendship/Stygian and the Pillars came to the rescue
Meanwhile at the Castle of Friendship, everyone and everypony were having a great celebration. All of a sudden, a black storm cloud appears in the sky over the castle. A large, ominous airship emerges from the clouds and lands on the festival grounds. Clouse comes out of the ship, announcing his arrival on behalf of the Overlord, and introduces Pythor. When the four princesses greet Pythor, he demands the immediate surrender of their magic. When they refuse, more airships appear, and Cryptor and the Nindroid Army invade the city. Just as they surrounded Twilight and the princesses, Stygian and the Pillars of Old Equestria: Star Swirl the Bearded, Rockhoof, Mage Meadowbrook, Somnambula, Mistmane and Flash Magnus came to the rescue just in time.

The Great Escape in Hot Pursuit/The Overlord found Nadakhan's lamp
Soon enough, Po, SpongeBob, Twilight and all of their friends along with the princesses made a huge escape in hot pursuit. Just as the Overlord rally the search, he found the lamp of an evil Djinn named Nadakhan.

Gathering at the Jade Palace/Learning the history of the Overlord
Meanwhile, Po, SpongeBob, Twilight and their friends gathered together at the Jade Palace. When they look the ancient scrolls, Twilight found the history of the Overlord. As they read the ancient history, they learned the great battle between the First Spinjitzu Master and the Overlord himself.

Discovering the Prophecy of Good and Evil/The Quest of find the heroes begin
Later, SpongeBob found a prophecy of Good and Evil predicted by the Spirit of Oogway long ago. It was foretold that only the Dragon Warrior, the Ten Heroes of Equestria, the Pillars of Old Equestria, the Twelve Apprentices of the Mane Ten, and the Heroic 6 of Bikini Bottom can unite the Eight Heroes of Chima and Nine Ninjas of Ninjago, defeat the Overlord and restore peace to the universe. At last, the Quest for the two groups of heroes begin.

Evil Twilight Sparkle proves her loyalty to the Overlord/Making a first wish
Meanwhile at the Castle of Friendship, the Group of Equestrian Leaders (except for Queen Novo, Princess Ember and Prince Thorax) were held hostage. When the Evil Twilight Sparkle proves her loyalty to the Overlord, he ordered her to gather the others for the search of the Alicorn Princesses. Just as they left, the Overlord makes his first wish by using the Universal Map of the Castle to find the four princesses of Equestria.

Arriving in the World of Chima/Meeting the Eight Heroes of Chima
Back with Po, SpongeBob, Twilight and their friends, they arrived in a place called Chima. Along the way, they met with the Eight Heroes of Chima themselves, Laval, Prince of the Lion Tribe, Cragger, Prince of the Crocodile Tribe, Eris of the Eagle Tribe, Gorzan of the Gorilla Tribe, Worriz of the Wolf Tribe, Razar of the Raven Tribe, Rogon of the Rhino Tribe, and Bladvic of the Bear Tribe as they all meet at the The Lion Chi Temple.

Welcome to Mount Cavora/Seeking help from the Leaders of the Tribes
When everyone and everypony arrived on Mount Cavora, they seek help from Fluminox, Leader of the Phoenix Tribe, Sir Fangar, Leader of the Saber-Tooth Tiger Tribe, Vardy, Leader of the Vulture Tribe, Maula, Leader of the Mammoth Tribe, Icebite, Leader of the Ice Bear Tribe, Lagravis, Laval's father and King of the Lion Tribe, King Crominus and Queen Crunket of the Crocodile Tribe. With every ally of Chima gathered together, SpongeBob couldn't believe what new friends to make.

The Dark Tribes and the Mean Six attack/Using the Orbs of Chi
Suddenly, there was an attack coming from the Dark Tribes led by Scorm, Braptor, Spinlyn and the Mean Six. Just as they surround Twilight and the Princesses of Equestria, Laval and his friends passed the Regular and Fire Orbs of Chi to Po, SpongeBob, Twilight and their friends to possess and took them out one by one as they retreated.

The Overlord's second wish/Master Chen and his gang returned
Meanwhile, the Overlord was upset with the Mean Six and the Dark Tribes failing. Then, he makes his second wish with Nadakhan for Master Chen and his followers to be revived. As they return, Master Chen was grateful for his help, and they serve him in return.

Facing the Sky Pirates/Arriving in Ninjago/Meeting with the Ninjas
On the airship, Po, SpongeBob, Twilight and their friends hide from a crew of Sky Pirates led by Captain Soto, but they are soon discovered. As indicated by the insignia on their uniforms, they are also in league with the Overlord. As the Sky Pirates decide what to do with the stowaways, they turn to Captain Soto. After consulting the Overlord's rule book, he declares that they be tossed overboard. But just before they do so, Captain Celaeno and her crew, Boyle, Lix Spittle, Squabble and Mullet helped them refuses out of fear of suffering the Overlord's wrath. Po, SpongeBob, Twilight and their friends learn that before the Sky Pirates served the Overlord, they used to be sky pirates. Through the song Time to Be Awesome, Rainbow Dash, Celaeno and their friends encourage the Sky Pirates to oppose the Overlord's iron-fisted rule and return to their swashbuckling ways. Inspired by Rainbow's words, the Sky Pirates discard their uniforms and raise their ship's rainbow-colored sails. In celebration of the pirates' return to glory, Rainbow Dash performs a sonic rainboom. As they all arrived in Ninjago, they met with the Ninjas themselves, Kai, Cole, Jay, Zane, Lloyd Garmadon, Kai's sister, Nya, Skylor, Li'l Nelson and Ken. As they arrived at the temple, they met with Kai and Nya's parents, Ray and Maya, Lloyd's parents, Sensei Garmadon and Misako, Lloyd's uncle and Garmadon's younger brother, Sensei Wu, Ronin, P.I.X.A.L., Skales, Fangtom, Acidicus and Skalidor. Soon, Misako foretold Po, SpongeBob, Twilight, Laval and their friends about the Overlord's ancient history during the First Spinjitzu Master's final battle with him.

Making his final wish/Seeking out the Alicorns of Equestria
Back with the Overlord, he discovered the Sky Pirates betrayed him. So, he makes his final wish with Nadakhan to seek out the Alicorn Princesses of Equestria so that they would be found.

Capturing the Alicorns/The Overlord steals the Alicorn Magic
Meanwhile at Ninjago, Po, SpongeBob, Twilight, Laval, Lloyd and all of their friends were preparing to save Equestria, when suddenly, the Nindroid Army came out of nowhere. Just as Laval, Po and the others tried to protect the alicorn princesses, the Mean Six, General Cryptor, Acronix, Krux and Pythor P. Chumsworth came out of nowhere and captured them for hostage. SpongeBob was so scared to save them on their own, he had to go home without hurting anyone. Just as Twilight, Celestia, Luna and Cadance were taken to the Overlord, he stole their Alicorn Magic to transform himself into his original form, a dragon.

The Stone Army awakens/Po, Lloyd, Laval and their friends make their plans
With Equestria shrouded in darkness, the Overlord has awaken the Stone Army with General Kozu leading them. Meanwhile, SpongeBob and Patrick were about to give up, but Tigress, Po, Laval, Cragger, Eris and Lloyd helped them realize about the prophecy that they can complete without them. Then, SpongeBob knew that he never wanted Twilight to be endanger. As Po, Lloyd, Laval and their friends make their plans, Po taught SpongeBob about inner Peace and Chi from within him.

Begin the Element of Surprise/Rescuing Twilight and the Princesses/Pythor reforms
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Po, Laval and Lloyd vs. the Overlord/Equestria is saved/A rejoicing of our heroes
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Scenes

 * 1) The Friendship Festival/SpongeBob, Po and their friends joined in the fun
 * 2) Shifu Cheng Ru and Li Shan greeted the Princesses of Equestria
 * 3) Celebrating a Banquet in honor of the Alliance of Friendship/Begin a toast
 * 4) Flurry Heart begins to like Po/Forming a Peace Treaty to their Realms
 * 5) The Overlord has returned/Creating the Mean Six out of pure darkness
 * 6) Storm over the Castle of Friendship/Stygian and the Pillars came to the rescue
 * 7) The Great Escape in Hot Pursuit/The Overlord found Nadakhan's lamp
 * 8) Gathering at the Jade Palace/Learning the history of the Overlord
 * 9) Discovering the Prophecy of Good and Evil/The Quest of find the heroes begin
 * 10) Evil Twilight Sparkle proves her loyalty to the Overlord/Making a first wish
 * 11) Arriving in the World of Chima/Meeting the Eight Heroes of Chima
 * 12) Welcome to Mount Cavora/Seeking help from the Leaders of the Tribes
 * 13) The Dark Tribes and the Mean Six attack/Using the Orbs of Chi
 * 14) The Overlord's second wish/Master Chen and his gang returned
 * 15) Facing the Sky Pirates/Arriving in Ninjago/Meeting with the Ninjas
 * 16) Making his final wish/Seeking out the Alicorns of Equestria
 * 17) Capturing the Alicorns/The Overlord steals the Alicorn Magic
 * 18) The Stone Army awakens/Po, Lloyd, Laval and their friends make their plans
 * 19) Begin the Element of Surprise/Rescuing Twilight and the Princesses/Pythor reforms
 * 20) Po, Laval and Lloyd vs. the Overlord/Equestria is saved/A rejoicing of our heroes

Trivia

 * The story continues in ???.