Thomas and Twilight Sparkle's Adventures of the Little Engine that Could is the first Thomas/MLPFIM/Disney/Non-Disney Crossover film to be created by Tonygoldwing and 76859Thomas. but soon this film is to be replaced with Thomas and Twilight Sparkle meets The Fox and the Hound. A remake will soon be made by Stuingtion.
Little Engine wakes the control tower up, so she can start work. She dreams of being a dream hauler. But the control tower confirms that she is too small to pull her own train. She gets a little help from Rusty, an old and wise Engine. In The Real World, a boy named Richard shows his friend Marcus, his grandfather's watch. Two bullies named, Scott and Stretch, throw a snowball at Richard, which makes him slip and hand the watch over to them. He is worried that his dad would be unhappy if he lost the watch. Marcus tries to help him, but Richard does not want help from him. Richard decides to take a walk in the park, but trips over some train tracks he has never noticed before. He boards a train to take shelter from the cold, and suddenly is whisked away to DreamLand. While passing through the tunnel to DreamLand, the tunnel collapses, trapping Richard and the trains in DreamLand. Tower demotes Rusty to a track-cleaner. Little Engine offers to take Richard home on the rumored tracks that lead over the mountain. The Control Tower, looking for a way to preoccupy Little Engine and Richard while the other trains try to do the important work of clearing the tunnel, agrees, sending them both on their way while also promising to give Rusty his job back afterwards and even throw him a Ticker-Tape Parade. Little Engine finds the track leading up the mountain. Along the way, they encounter the Nightmare Train, but trick him into speeding down a side-track, and are able to continue on their way. This shows Richard how to stand up to bullies. Little Engine, with the help of Richard, also deals with a water leak and a derailment, and eventually makes it over the mountain to the Real World. Little Engine returns to DreamLand, tells her story about her trip over the mountain, and is promoted to a dream hauler as a reward for her bravery. Once back, Richard has gained the confidence to confront the bullies and get his watch back. During the Credits, the following photos are shown: Richard showing his watch to his class, the Sock Monkey being loved, the Nightmare Train defeated and derailed on a snow bank, Rusty's Ticker-Tape Parade, and lastly, Little Engine taking more trains through the Mountain.
- Edward, Gordon, Henry, Spencer, Amos Slade, Chief, Copper, Princess Celestia, Ploddy the Police Car, Diesel 10, Discord, Queen Chrysalis and Nightmare Moon are guest starring in this film. In the remake
- Thomas & Friends: Day of the Diesels, Thomas & Friends: Series 15, My Little Pony Friendship is Magic: Series 2, Family Guy season 9, The Fox and the Hound: 30th Anniversary, The Fox and the Hound 2 and The Little Engine that Could were all released in 2011.
- The Little Engine is addressed by her fan-given name of Tracy.