Where did humanity leave Earth in the story of Pokémon Pokopia?

In Pokémon Pokopia, humanity left Earth for outer space.

The game’s story reveals that unexplained phenomena made the landscape increasingly inhospitable to life. Humans eventually departed the planet, but they could not take all their Pokémon with them. Instead, they stored Pokémon in a massive computer system designed to continue operating after humanity’s departure.

Ditto uncovers this history through logs left behind by humans. The plot’s environmental mystery is therefore connected to both the abandoned landscape and the preservation system that released Pokémon when it began to fail. The setting is post-apocalyptic, but the story ultimately points beyond Earth rather than to a simple human extinction narrative.

The ending reinforces this idea: an apparent structure is revealed to be a rocket ship, which launches into space after an emergency evacuation protocol is triggered. A human later discovers the drifting vessel and its contents.