Littlefoot and The Dark Crystal is the first Land Before Time/Jim Henson 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 Stan, Mickey, Jesse, and their friends) have traveled to another world, another time, in the age of wonder where they meet a Gelfling named Jen, who is revealed to be Jake's cousin, and they helped him find the Dark Crystal and defeat the rulers of the Crystal: The Skeksis, whom Carface, Killer, Oogie Boogie, Bowser, Mistress Nine, Bowser Jr., Ranamon, Pete, Dr. Facilier, Lord Rothbart, Shere Khan, Makunga, Clayton, Ursula, Eris, and Team Rocket (Cassidy and Butch) work for.
- Stan Marsh, Kyle Broflovski, Eric Cartman, Kenny McCormick, Mickey Mouse, Donald Duck, Goofy, Ali, Bron, Shorty, Celebi, Jesse, Elvis, Randolph Johnson, Nadine, Jiminy Cricket, Zazu, Mickey Mouse, Donald Duck, Goofy, Jake Sully, Neytiri, the Goonies (Mikey Walsh, Brand Walsh, Mouth Devereaux, Data Wang, Chunk Cohen, Andy Carmichael, Stef Steinbrenner, and Sloth Fratelli), Taran, Princess Eilonwy, Fflewddur Fflam, Gurgi, Aladdin, Abu, Iago, Baloo, Bagheera, King Louie, Jean-Bob, Speed, Puffin, King Julien, Maurice, Mort, The Penguins of Madagascar (Skipper, Kolwalski, Rico, and Private), Tantor, Terk, Sebastian, Fu Dog, Kenai, Koda, Rutt and Tuke, Roger Rabbit, Rex, Woog, Elsa, Dweeb, Aladar, Neera, Plio, Yar, Zini, Suri, Baylene, Eema, Url, Jack Skellington, Charlie, Itchy, Ponyo, Sosuke, Fujimoto, Lisa, Scooby-Doo, Shaggy Rogers, Fred Jones, Daphne Blake, Velma Dinkley, Mrs. Brisby, Jeremy the Crow, Carface, Killer, Oogie Boogie, Bowser, Mistress Nine, Bowser Jr., Ranamon, Pete, Dr. Facilier, Lord Rothbart, Shere Khan, Makunga, Clayton, Ursula, Eris, and Team Rocket (Cassidy and Butch) guest star in this film.
- This is an NTSC film with NTSC bits from The Land Before Time movies, South Park: Bigger, Longer & Uncut, Pokémon 4Ever, Free Willy 1-3, Pinocchio, The Lion King 1 and 2, Mickey, Donald, Goofy: The Three Musketeers, Mickey's House of Villains, A Goofy Movie, An Extremely Goofy Movie, Runaway Brain, Avatar, The Goonies, The Black Cauldron, the Aladdin trilogy, The Jungle Book 1 and 2, TaleSpin: Plunder and Lightning, The Swan Princess trilogy, Madagascar, Madagascar: Escape 2 Africa, Madagascar 3: Europe's Most Wanted, Tarzan, The Little Mermaid trilogy, Brother Bear 1 and 2, We're Back! A Dinosaur's Story, Dinosaur, The Nightmare Before Christmas, the All Dogs Go to Heaven trilogy, Ponyo, the Scooby-Doo movies, The Secret of NIMH 1 and 2, The Princess and the Frog, and Sinbad: Legend of the Seven Seas.
- The reason why most of the Jungle Adventure Crew is guest starring in this film, is because Louis is the only member to be in Ash Ketchum and The Dark Crystal.
- When Littlefoot and the gang meet Jen, Jake Sully is dubbed as Billy Gambini from My Cousin Vinny saying "My cousin Jen!"
- The Land Before Time, We're Back! A Dinosaur's Story, and The Dark Crystal were released by Universal Pictures.
- Both The Dark Crystal and The Secret of NIMH were released in 1982.
- The Dark Crystal had another home video release in 1994, the same year that The Land Before Time II: The Great Valley Adventure and The Return of Jafar were released straight to video and The Swan Princess was released in theaters.
- The Black Cauldron, The Goonies, Free Willy, and The Dark Crystal were filmed in 2.35:1 Widescreen format.