Nimo

A young boy named Nemo experiences a series of nightmares, including being pursued by a locomotive. Upon awakening, he goes with his pet flying squirrel, Icarus, to see a parade welcoming a traveling circus. Nemo is approached by figures from the circus parade, including Professor Genius, who claims they were sent on a mission by King Morpheus to become Nemo's playmate, Princess Camille. Nemo is introduced to King Morpheus and the pair roam Slumberland together, but things take a turn when Flip, a mischievous clown, tempts Nemo to unlock a door that unleashes a nightmare. Nemo must navigate this fantasy world, team up with his friends, and ultimately defeat the Nightmare King to save King Morpheus and his own world.