Masami Hata & William Hurtz (1989)

A young boy whose dreams transcend reality is sucked into his own fantasy, which is everything he has dreamed of until he unleashes a century old secret that may not only destroy this perfect dream world but reality itself.

Little Nemo: Adventures in Slumberland is a 1989 Japanese-American animated musical-comedy adventure fantasy film directed by Masami Hata and William Hurtz. Based on the comic strip Little Nemo in Slumberland by Winsor McCay, the film went through a lengthy development process with a number of screenwriters. Ultimately, the screenplay was credited to Chris Columbus and Richard Outten.. The original soundtrack was penned by the Academy Award-winning Sherman Brothers. The film features the English dub voices of Gabriel Damon, Mickey Rooney, René Auberjonois, Danny Mann, and Bernard Erhard.