Littlefoot's Adventures of The Three Musketeers is the first Land Before Time/Mickey Mouse crossover planned to be re-edited by yru17. It is unknown when the film will be shown on YouTube.
Littlefoot and his friends (along with Ash, SpongeBob, Stan, and their friends) take a time-travel vacation to France and reunite with their old friends Mickey Mouse, Donald Duck, and Goofy as they become musketeers and rescue Princess Minnie from Captain Pete, the Beagle Boys, Carface, Killer, Dr. Facilier, Plankton, The Grand Duke of Owls, his nephew Hunch, Oogie Boogie, Shere Khan, Makunga, Rothbart, Ozzy, Strut, Ichy, Dil, Cassidy, Butch, and the Bowser family.
- Ash Ketchum, Pikachu, Misty, Brock, Togepi, SpongeBob SquarePants, Patrick Star, Squidward Tentacles, Sandy Cheeks, Eugene Krabs, Stan Marsh, Kyle Broflovski, Eric Cartman, Kenny McCormick, 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, Rex, Woog, Elsa, Dweeb, Aladar, Neera, Plio, Yar, Zini, Suri, Baylene, Eema, Url, Jean-Bob, Speed, Puffin, 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, and Team Rocket (Cassidy and Butch) guest star in this film.
- The only reason why Taran and Princess Eilonwy are guest starring alongside Fflewddur Fflam, Gurgi, and the Witches of Morva is because Robin Hood and Alice's Adventures of The Three Musketeers was made before they joined the team.
- The whole reason why Ash and the gang guest star in this film is because Pooh's Adventures of The Three Musketeers guest starred Team Rocket (Jessie, James, and Meowth) without Ash and the gang.
- This is the first Land Before Time crossover film to guest star the Dinosaur characters.
- This film marks the first debut of Skip from The Land Before Time TV series episode Return to Hanging Rock.
- This is the first time Bowser, Mistress Nine, Bowser Jr., and Ranamon guest star in a Littlefoot's Adventures film.
- Cassidy and Butch guest starred a few previous times in The Land Before Time/Star Wars saga, Littlefoot's Adventures of The Pebble and the Penguin, Littlefoot and The Return of Jafar.
- This film actually takes place after Pooh's Adventures of Epic Mickey, which explains Littlefoot and his friends already facing Bowser, Mistress Nine, and Bowser Jr. from that movie.
- Like Disneydaniel93's film Pooh's Adventures of The Three Musketeers, 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, Madagascar 3: Europe's Most Wanted, the Scooby-Doo movies, The Nightmare Before Christmas, We're Back! A Dinosaur's Story, Dinosaur, The Swan Princess trilogy, the All Dogs Go to Heaven trilogy, The Princess and the Frog, and Rock-a-Doodle.