Doraemon: Nobita in the Wan-Nyan Spacetime Odyssey

Nobita and Doraemon rescue stray cats and dogs and use Doraemon's Ray of Evolution to send them 300 million years into the past. They soon realize that this action has led to the development of a society of cat-and-dog people living at the same level of civilization as Nobita's present time. When an asteroid threatens to strike the city inhabited by these creatures, Nobita and his friends work together to protect Doraemon and help reduce the conflict between the cat and dog communities.