Which animated film tells the story of a young boy named Atari searching for his pet?

"Isle of Dogs" is a 2018 internationally co-produced stop-motion-animated science-fiction comedy drama film written, produced and directed by Wes Anderson. Set in a dystopian near-future Japan, the story follows a pack of banished dogs, led by street dog Chief, who helped a young boy named Atari searching for his own dog after the species is banished to an island following the outbreak of a canine flu. It has grossed over $64 million worldwide, and received praise for its animation, story, and deadpan humor.