The game is regularly updated with new Pokémon, and as of March 25, 2022, there are slightly more than 730 Pokémon in the game, not including regional variants, out of a total of 898.
Regional Pokémon are frequently released together, such as Hoenn region Pokémon in December 2017, Alolan variants in May 2018, Sinnoh region Pokémon (along with the Sinnoh Stone item used to evolve them) in October 2018, and Sinnoh region Pokémon (along with the Sinnoh Stone item used to evolve them) in October 2018.
Unova region Pokémon (and the Unova Stone) will be available in September 2019. In December 2020, more Alola region Pokémon will be released, followed by more Kalos region Pokémon in March 2022.
Mythical and legendary Pokémon are frequently released singly or in pairs/trios as part of special events or quests. Groudon was the first Legendary Pokémon to be released in December 2017.
Meltal and its evolved form, Melmetal, are the only Pokémon to have made their debut on Pokémon Go thus far.
What is the best starter Pokémon?
The Sinnoh region grass type is likely to become a stronger companion over time. However, some of the best starter Pokémon have this trait, with Turtwig eventually evolving into the incredibly powerful Torterra.
The character’s design alone is brilliant.