Where did humanity relocate after leaving Pokémon behind in Pokémon Pokopia?

In Pokémon Pokopia, humanity relocated to outer space after leaving the planet.

The game’s story reveals that unexplained environmental phenomena made the landscape increasingly hostile to life. Humans eventually departed for outer space, but they could not take all their Pokémon with them.

Instead, the Pokémon were stored in a massive computer system designed to continue operating after humanity’s departure. The system could release Pokémon when necessary, helping preserve life even though the original human population was gone.

This plot detail explains why Pokopia begins in an abandoned, post-apocalyptic version of Kanto. It also provides the background for the logs and technological structures that Ditto encounters. The destination is not another Pokémon region or a hidden underground settlement; the story specifically points beyond Earth.