Pokémon Pokopia features 300 selected Pokémon from Generations I through IX.
This roster spans the first nine Pokémon generations rather than representing only the original Kanto creatures. The selection supports Pokopia’s habitat-building design: different Pokémon appear when players create environments that meet their preferences, such as placing suitable vegetation or objects nearby.
The game therefore uses the roster as part of its simulation systems. As players build up an area, Pokémon are attracted to it, and befriended Pokémon can help Ditto cultivate the world. Some also teach moves that provide practical environmental abilities.
The number 300 refers to the Pokémon selected for Pokopia, not the total number of species in the wider Pokémon franchise. It should also not be confused with a Pokédex number or the number of Pokémon available in any particular habitat. The selection covers Generations I through IX, giving the game a broad cross-generational cast while keeping its roster distinct from the complete series Pokédex.