Pokémon Pokopia features 300 Pokémon from Generations I through IX.
The total refers to the Pokémon included in Pokopia’s game world and related systems, not to every species in the complete franchise Pokédex. The selection draws from multiple generations so that the rebuilt habitats can contain a broad mixture of familiar Pokémon.
This number is easy to confuse with milestone totals from the main series. The original games introduced 151 species, while later generations expanded the franchise into the hundreds. Pokopia’s 300-Pokémon roster is a curated selection designed for its social-simulation setting, where Pokémon appear according to habitats and environmental conditions.