Bloom's Adventures of The Great Mouse Detective is the very first Winx Club crossover film planned to be made by RatiganRules, who is co-directing the remake version of Winnie the Pooh in The Adventures of the Great Mouse Detective with Daniel Esposito. It is also the first Winx Club crossover with a Disney film. It is planned to be made after Pooh's Adventures of Winx Club Season 2.
Taking place after the events of Pooh's Adventures of Winx Club Season 2, Bloom and her friends take a vacation to London in 1897 and meet Basil of Baker Street, Dr. David Q. Dawson, and Olivia Flaversham as they solve thier mystery, find Olivia's father Hiram Flaversham, and battle against Professor Ratigan, whom Icy, Darcy, and Stormy work for.
- The Trix (Icy, Darcy, and Stormy) will work for Professor Ratigan in this film.