What is the name of Pokémon Pokopia’s playable game mode for one person?

Pokémon Pokopia includes a single-player mode.

Single-player is one of the game’s two listed modes, alongside multiplayer. It lets one player experience the story, explore the environment, complete Pokémon requests, and develop the village without requiring other participants.

The presence of multiplayer does not turn Pokopia into a competitive battle game. Its cooperative features are tied to visiting and building in shared spaces, while the single-player experience remains a complete way to engage with the game’s world and progression.

The exact label matters here. “Solo Battle” and “Story Battle” sound plausible because Pokémon games often use battle and story terminology, but neither is the credited mode name. The listed mode is simply single-player.