Pokémon Pokopia's main Pokédex contains 300 Pokémon.
Unlike a conventional battle-focused Pokémon game, Pokopia asks players to create suitable habitats to make Pokémon appear. Completing the Pokédex therefore connects collection with the game's central building and environmental-restoration mechanics.
Registered Pokémon also provide progression rewards, including recipes used to create items and decorations. The full collection has an additional completion reward, making the Pokédex more than a simple catalogue of creatures encountered during exploration.
The total of 300 applies to the main Pokédex described for the game. Event Pokémon and downloadable-content additions can be discussed separately, so the main total should not automatically be treated as every Pokémon ever available in Pokopia.