Littlefoot's Adventures of Scooby-Doo! The Mystery Begins is the first Land Before Time/Scooby-Doo crossover film planned to be re-edited by yru17. It is planned to be shown on either YouTube or Vimeo after Littlefoot's Adventures of Pokémon 3: The Movie.


Littlefoot and his friends (along with Stan, Kyle, Cartman, Kenny, and Genie) time-travel to Coolsville and meet four teenagers named Shaggy, Fred, Daphne, and Velma and a dog named Scooby-Doo. When the school is taken over by three ghosts, Littlefoot, Cera, Ducky, Petrie, Spike, Chomper, Ruby, Guido, Stan, Kyle, Cartman, Kenny, Genie, Scooby-Doo, Shaggy, Fred, Daphne, and Velma must team up to solve their first mystery.