Doraemon the Movie: Nobita in the Wan-Nyan Spacetime Odyssey

Nobita, moved by a stray dog he names Ichi, and later a cat named Zubu, adopts numerous stray animals. He and his friends use a time machine to send the animals back 300 million years to a time with no other living beings. They plan to visit them the next day. However, a time-space anomaly sends them 1,000 years before their intended destination. They discover the animals have evolved into a sophisticated society. Their time machine is broken, and they must find a way to repair it. They also learn of an impending asteroid collision threatening Earth. Nobita hopes to reunite with Ichi, and is intrigued by Hachi, a dog who greatly resembles his friend. The group's adventure through time and space begins as they face these challenges.