Doraemon: Nobita in the Wan-Nyan Spacetime Odyssey

In "Nobita in the Wan-Nyan Spacetime Odyssey" (2004), the boy Nobita and his robotic cat Doraemon unwittingly create a parallel society by sending stray cats and dogs back in time. This act spawns a sophisticated hybrid civilization that mirrors their own era, complete with cultural and technological parity. As an asteroid threatens the city, Nobita and his friends navigate a tense standoff between cats and dogs, striving to save Doraemon and restore harmony through clever inventions and heartfelt diplomacy.