After becoming the champion of the Alola region, Satoshi returned to the Kanto region, where he met a new coach named Go. He wants to catch all the Pokémon to get closer to Mew. In order to explore the world of Pokemon, they go on a trip to all regions. In the Galar region, they meet the world champion, Dande. To defeat him, Satoshi decides to participate in the Pokemon World Championship.