Approximately how many Pokémon species were available when Pokémon Go launched?

Pokémon Go launched with approximately 150 Pokémon species available.

The mobile game debuted in 2016 as an augmented-reality experience for iOS and Android. It used GPS and real-world maps to place Pokémon, PokéStops, and Gyms in the player’s surroundings, turning collection into an outdoor activity.

The launch roster was based primarily on the original Pokémon from the first generation. This choice connected the new mobile game with the franchise’s earliest era and made familiar creatures such as Bulbasaur, Charmander, Squirtle, and Pikachu central to its initial appeal.

New Pokémon species were added over time through later updates. The launch figure is therefore different from the number available in the game today and from the original Pokédex total of 151, since availability and game mechanics affected which species could initially be encountered.