Crayon Shinchan the Movie: Fast Asleep! The Great Assault on the Dreaming World

This story takes place in a dream world, where the Kasukabe Defense Forces and the Nohara family battle a growing nightmare threat. After the people of Kasukabe experience a bizarre dream in which a giant fish swallows them, they suddenly gain the ability to dream whatever they desire. At first, they enjoy crafting their own unique dreams, but the dream world slowly twists into a nightmare realm. Shinnosuke Nohara and the Kasukabe Defense Forces recruit Saki Nubatama, a new girl in town, and together they venture into the dream world to uncover the source of the spreading nightmares.