Regions

Regions are an organized areas of the Pokémon world known from previous games about Pokémon such as games from core series. In Pokémon GO there are currently only three regions referred, which are Kanto, Johto and Hoenn.

Kanto
The Pokémon known from Kanto region were the base Pokémon released in Pokémon GO. But not all Pokémon of this Generation were released at this time.

There are currently two Pokémon, that are still not available and not officially scheduled to be released:
 * Mewtwo (currently available only from EX Raid Battle that are in tests)
 * Mew

History

 * Most of the Pokémon from Kanto was released with the game release.
 * November, 2016 – Ditto was released in the games, disguised as other Pokémon.
 * July, 2017 to July , 2017 – Articuno were available from Raid Battles.
 * July, 2017 to August , 2017 – Moltres were available from Raid Battles.
 * August, 2017 to August , 2017 – Zapdos were available from Raid Battles.
 * From August, 2017 to August , 2017 - All three Legendary Birds were available from Raid Battles.

Johto
Johto is so far the second region from which Pokémon are available in Pokémon GO. The Pokémon from this region were firstly released in December, 2016 as Baby Pokémon available to hatch from Pokémon Eggs.

There are currently several Pokémon, that are still not available nor officially scheduled to be released:
 * Smeargle
 * Delibird
 * Celebi

History

 * December, 2016 - Togepi and Pichu along with another Baby Pokémon and Togetic as evolution of Togepi were released as Pokémon available only to hatch from Pokémon Eggs.
 * February, 2017 - over 80 Pokémon from this region became available to catch in the wild and hatch from eggs.
 * July, 2017 - Lugia was released as the Legendary Raid Boss and were available to catch only after defeating it.
 * From August, 2017 to September , 2017 - Legendary Beasts were available as the Legendary Raid Bosses and were available to catch only after defeating them. All three of these Pokémon were exclusive to following regions:
 * Raikou could be battled throughout the Americas
 * Entei could be battled throughout Europe and Africa
 * Suicune could be battled throughout the Asia-Pacific region
 * On September, all three of Legendary Beasts moved to different locations and are available until October in following regions:
 * Raikou can be battled throughout the Asia-Pacific region
 * Entei can be battled throughout the Americas
 * Suicune can be battled throughout Europe and Africa
 * On October, all three of Legendary Beasts moved for last time to different locations and were available until November in following regions:
 * Raikou - Europe and Africa the
 * Entei - Asia-Pacific region
 * Suicune - the Americas.
 * From October, 2017 until December , 2017 - Ho-Oh was released as the Legendary Raid Boss and were available to catch only after defeating it.

Hoenn
Hoenn is the third region from original core series of which Pokémon are now available in Pokémon GO. Selected Pokémon from this region were first released in October 2017 as a part of Halloween event. The remaining Pokémon of this region are yet to be released, but they're currently in the game code.

History

 * On October, 2017, five Pokémon of Ghost and Dark types were released as a part of Halloween event. Those were Sableye, Shuppet, Banette, Duskull and Dusclops.
 * December, 2017 - 50 Pokémon from Hoenn-region became available to catch in the wild and hatch from eggs along with Weather game feature.

Trivia

 * Another term used in Pokémon GO players community to describe Pokémon groups from each region is Generations. Which also is valid but it wasn't officially referred in game nor by its creators on official social-media and information channels.
 * Therefore Kanto is Generation I, Johto is Generation II, Hoenn is Generation III and so on.
 * More about generations you can find here.
 * Common thing for Pokémon, that are not available with main release of each region Pokémon, is that those Pokémon either are legendary and/or mythical or have certain, special moves like Ditto, Delibird or Smeargle.
 * There are at most sixteen known regions that have appeared in the various Pokémon canons.
 * There has been Pokémon species from Hoenn added to game code since update 0.71.0.
 * Taking into account, that new Pokémon are released in the game every 6-8 month, Pokémon from Sinnoh region might be released on the anniversary of the game.
 * On December, 2017 in Apple Watch Store, Pokémon GO banner with Starter Pokémon from Hoenn region appeared- leaking release of Hoenn-region Pokémon that happened next day.
 * Release of first fifty Pokémon from Hoenn region and Weather feature had trailer with similar cinematic style as trailer for release of Legendary Pokémon in raid battles and new gyms system and trailer of the game itself.