Littlefoot's Adventures of Runaway Brain is another upcoming Land Before Time/Mickey Mouse film planned to be re-edited by Yru17. It is unknown when it will be shown on YouTube, although it will be part of a double feature.
In the cartoon, Mickey is hooked on a Mortal Kombat-style video game based on Snow White and the Seven Dwarfs when Minnie arrives to find that Mickey forgot their dating anniversary. Mickey comes up with a last-minute idea to take her to a miniature golf course. Showing her a newspaper, Minnie misinterprets and thinks Mickey is taking her to Hawaii, a trip that would cost $999.99. An excited Minnie skips out the door before Mickey can set her straight, causing Mickey to worry about how to earn so much money. Pluto shows his master the "help wanted" ads, and Mickey finds an ad for work with a mad scientist, named Dr. Frankenollie (an inside joke reference to Disney animators Frank Thomas and Ollie Johnston, while also referring to Frankenstein) for a day of "mindless work" that would instantly give him $999.99.Mickey goes to the home of the simian Dr. Frankenollie (played by Kelsey Grammer of Frasier fame, also known for Sideshow Bob from The Simpsons). When he knocks the door, Mickey gets sucked downward through a trap door into Frankenollie's laboratory, where Frankenollie plans to switch Mickey's brain with that of his monster, Julius (portrayed by perennial nemesis Black Pete). Although Dr. Frankenollie is killed in the experiment, the brain transfer is a success, with Mickey's mind ending up in Julius' giant body, and Julius finding himself in control of Mickey's body. The dimwitted and insane Julius finds Mickey's wallet in his pocket and, finding a photo of Minnie, is instantly smitten with her. He escapes the laboratory on a hunt for Minnie, whom he finds shopping for a bathing suit. When the real Mickey (in Julius' body) shows up to save his girlfriend, Minnie screams for help and runs until Mickey convinces her of who he is. Julius continues to pursue Minnie, leading to an epic battle between the two of them ("Go get em, Mickey," cheers Minnie. "Rip his ears off!"). During the course of their battle, Julius and Mickey fall onto electric wires, which cause their minds to transfer back to their correct bodies. Although Julius is more of a threat than ever now that he is again in control of his own monstrous body, Mickey manages to subdue him and save Minnie. Julius falls from the tall building with a bungee rope, which then winds itself up and down like a yo-yo. The closing scene of the film finds Mickey and Minnie on their way to Hawaii, with Julius providing the horsepower for their inner tube as he swims towards the same photo Mickey had in his wallet that Julius saw before.
- Ash Ketchum, Pikachu, Misty, Brock, Togepi, SpongeBob SquarePants, Patrick Star, Squidward Tentacles, Sandy Cheeks, Eugene Krabs, Stan Marsh, Kyle Broflovski, Eric Cartman, Kenny McCormick, Ali, Bron, Shorty, The Goonies (Mikey Walsh, Brand Walsh, Mouth Devereaux, Data Wang, Chunk Cohen, Andy Carmichael, Stef Steinbrenner, and Sloth Fratelli), Jesse Greenwood, Elvis, Randolph Johnson, Nadine, Celebi, Taran, Princess Eilonwy, Fflewddur Fflam, Gurgi, Orddu, Orgoch, and Orwen, The Flying Dutchman, Baloo, Bagheera, The Vultures, Jiminy Cricket, Zazu, Alex, Marty, Melman, Gloria, The Penguins of Madagscar (Skipper, Kolwalski, Rico, and Private), Chanticleer, Scooby-Doo, Shaggy Rogers, Fred Jones, Daphne Blake, Velma Dinkley, Jack Skellington, Jean-Bob, Speed, Puffin, Rex, Woog, Elsa, Woog, Aladar, Neera, Plio, Yar, Zini, Suri, Baylene, Eema, Url, Crysta, Batty Koda, Devon and Cornwall, Fievel Mousekewitz, Tiger, Tony Toponi, Tanya Mousekewitz, Yasha Mousekewitz, Papa Mousekewitz, Mama Mousekewitz, Charlie Barkin, Itchy Itchiford, Carface, Killer, Sheldon J. Plankton, Creeper, Dr. Facilier, The Grand Duke of Owls, Hunch, Oogie Boogie, Shere Khan, Makunga, Lord Rothbart, Bowser, Mistress Nine, Bowser Jr., Ranamon, Ozzy and Strut, Ichy and Dil, Sir Ruber, Ruber's Griffin, Warren T. Rat, Cat R. Waul, and Team Rocket (Jessie, James, Meowth, Cassidy and Butch) guest star in this film.
- This short film will be part of a double feature with Littlefoot Meets Peter Pan.
- Zazu will make his full guest appearance in this short film, despite his short cameos in the real short film.
- Like DisneyJSman's film Pooh's Adventures of Runaway Brain, this is an NTSC film with NTSC bits from The Land Before Time series, the Pokémon movies, The SpongeBob SquarePants Movie, South Park: Bigger, Longer & Uncut, The Goonies, Free Willy 1-3, The Black Cauldron, The Jungle Book 1 and 2, Pinoccho, Mickey's Christmas Carol, The Lion King 1 and 2, Madagascar, Madagscar: Escape 2 Africa, the Scooby-Doo movies, The Nightmare Before Christmas, The Swan Princess trilogy, We're Back! A Dinosaur's Story, Dinosaur, FernGully: The Last Rainforest, Quest for Camelot, An American Tail 1 and 2, the All Dogs Go to Heaven trilogy, The Princess and the Frog, and Rock-a-Doodle.
- Also like in DisneyJSman's film Pooh's Adventures of Runaway Brain (in which Winnie the Pooh and the Bear from The Fox and the Hound had their brains switched), Guido and the Griffin from Quest for Camelot will have their brains switched.