Thomas' Adventures of The SpongeBob SquarePants Movie

Thomas and Twilight Sparkle's Adventures of The SpongeBob SquarePants Movie is a Thomas/MLPFIM/Non-Disney Crossover film created by 76859Thomas.

Summary
Thomas, Percy, James, Toby, Emily, Gordon, Henry, Edward, Bash, Dash, Ferdinand, Luke, Charlie, Hiro, Paxton, Victor, Kevin, Stanley, Rosie, Twilight Sparkle, Applejack, Pinkie Pie, Fluttershy, Rainbow Dash, Rarity, Spike, Apple Bloom, Sweetie Belle, Scootaloo, Shining Armor, Princess Cadence, Heckle and Jeckle, Cool McCool, Sophie and Sky have traveled to Bikini Bottom and they join their old friends SpongeBob and Patrick on a quest to find King Neptune's crown and help defeat SpongeBob's enemy, Plankton (whom Discord works with).

Trivia

 * Discord is the only villain to be working with Plankton.
 * It is revealed to be Princess Cadence and Mindy are best friends.
 * It is also revealed that King Neptune and Mindy are old friends of King Triton, Ariel and their six other daughters/sisters from Disney's The Little Mermaid.
 * After Plankton was defeated at the end of this film, Thomas, Twilight and their whole Adventures team use the Elements of Harmony to defeat Discord (from that whole scene from My Little Pony: Friendship is Magic - The Return of Harmony Part 2).