Doraemon: Shin Nobita no Uchuu Kaitakushi

Nobita wakes up to the sensation of the floor shaking, as if during an earthquake. A small rabbit named Chamii, from another universe, breaks through the floor using a hammer and enters his room. Doraemon and Nobita discover Chamii sneaking food from the kitchen and catch her. Chamii reveals a hidden passage beneath Nobita’s floor leading to a spaceship. They enter and find themselves near the Koya Koya Planet, where they meet a boy named Roppuru.