The base game of Pokémon Pokopia features 300 Pokémon.
These Pokémon are selected from Generations I through IX, giving the game a broad cross-section of the franchise rather than limiting it to one regional Pokédex. They appear as companions, residents, and characters connected to the habitats the player develops.
Pokopia’s use of Pokémon differs from the battle-focused main series. Players attract Pokémon by creating suitable environments, such as planting grass or arranging objects that match a species’ preferences. The resulting settlement is shaped by which habitats the player builds.
The figure of 300 refers to the base game’s roster. Later downloadable content adds further Pokémon, so the total available in the expanded version can differ from the launch-game count. This is why 300 should not be confused with the number of species in the entire Pokémon franchise.