Littlefoot's Adventures of Pokémon: Mewtwo Returns is another Land Before Time/Pokémon crossover film planned to be re-edited by yru17. It's unknown if the film will be shown on YouTube.
Littlefoot and his friends (along with SpongeBob, Cartman, Johnny, Gumball, their friends and their families) reunite Ash and the gang as they rescue Pikachu from Giovanni with the help of Mewtwo.
- SpongeBob SquarePants, Patrick Star, Sandy Cheeks, Squidward Tentacles, Eugene Krabs, Stan Marsh, Kyle Broflovski, Eric Cartman, Kenny McCormick, Johnny Test, Dukey, Susan Test, Mary Test, Hugh Test, Lila Test, Gumball Watterson, Darwin Watterson, Richard Watterson, Nicole Watterson, Anais Watterson and Sheldon J. Plankton guest star in this film.
- Plankton will work for Jessie, James, and Meowth of Team Rocket.
- Like BowserMovies1989 film Pooh's Adventures of Pokémon: Mewtwo Returns, this is an NTSC film with NTSC bits from The Land Before Time movies, The SpongeBob SquarePants Movie, and South Park: Bigger, Longer & Uncut.