Thomas' Adventures of Mumfie's Quest: The Movie is an upcoming Thomas & Friends/Non-Disney Crossover film to be created by 76859Thomas.
Thomas and his friends meets a little elephant called Mumfie as they meets Scarecrow, Pinky, Whale, and many friends, as they help the Queen of Night get back her powers from the Secretary of Night (whom The Rough Gang and Naga work for).
- The Bakugan Battle Brawlers and their Bakugan, The Powerpuff Girls (Blossom, Bubbles and Buttercup), The Rough Gang and Naga are guest starring in this film.
- The Rough Gang, Tirek and Naga will be working with The Secretary of Night.
- Both Thomas & Friends and Mumfie's Quest: The Movie were produced by Britt Allcroft.