In Pokémon Pokopia’s story, the humans left for outer space after abandoning the world.
The game’s background reveals that unexplained phenomena gradually made the landscape inhospitable to life. As conditions worsened, humanity departed rather than continuing to live on the damaged planet.
The humans could not take all their Pokémon with them. Instead, they stored Pokémon in a large computer system intended to preserve them and release selected Pokémon if the system began to fail. This explanation connects the empty landscape with the Pokémon Ditto later discovers.
The setting is therefore more than a simple deserted village. Pokopia presents a science-fiction mystery involving environmental collapse, automated preservation, and the possibility of reconnecting humans with the Pokémon left behind. Outer space is the destination stated in the game’s story, not another region within the Pokémon world.