According to the official Pokémon Go page, a whole new bunch of creatures are set to appear in the latest update from developer Niantic. Chikorita, Cyndaquil and Totodile from the Pokémon Gold and Pokémon Silver video games, will be joined with many others for you to catch and catalogue.
Alongside this will be new evolutions where some Pokémon originally discovered in the Kanto region will soon be able to evolve into Pokémon that inhabit the Johto region.
PokéStops will soon carry new evolution items to evolve some Pokémon further.
New AI is also promised for catching existing Pokémon so they’ll react in new ways. New item carousels will also allow you to select Berries and Poké Balls directly from the encounter screen, making it quicker to react. Pokestops will also have Nanab Berries and Pinap Berries. Giving a Pokémon a Nanab Berry will slow its movements, making it easier to catch. The Pinap Berry doubles the amount of Candy you’ll receive if your next catch attempt succeeds.
Finally, players can customize their look with a whole new selection of hats, shirts, pants, and other items.