List of Pokémon forms by release date

July 6th
Main release of Kanto-region. Regular (145) = Shiny (0)={||}

November 23rd
Ditto release.

Regular (1) =

Shiny (0)={||}

December 12th
Release of Johto-region Baby Pokémon. Regular (8) =

Shiny (0)={||}

February 16th
Main release of Johto-region. 84 Pokémon species including 26 forms of Unown were released, one for each letter of the alphabet.

Regular (109) =

Shiny (0)={||}

July 22nd
Articuno was available from Raid Battles for the first time. Lugia was released as the Legendary Raid Boss for the first time and were available to catch only after defeating it.

Regular (2) =

Shiny (0)={||}

July 31st
Moltres was available from Raid Battles for the first time. Regular (1) =

Shiny (0)={||}

August 7th
Zapdos was available from Raid Battles for the first time.

Regular (1) =

Shiny (0)={||}

August 14th
Mewtwo was confirmed as a Raid Boss.

Regular (1) =

Shiny (0)={||}

August 31th
Legendary Beasts were available as the Legendary Raid Bosses for the first time 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

Regular (3) =

Shiny (0)={||}

October 20th
Halloween event. Regular (5) =

Shiny (0)={||}

November 27th
Ho-Oh was released as the Legendary Raid Boss for the first time and were available to catch only after defeating it. Regular (1) =

Shiny (0)={||}

December 8th
Main release of Hoenn-region. Regular (50) =

Shiny (0)={||}

December 21st
2017 Holiday Event - Aquatic-themed Hoenn-region Event. Regular (21) =

Shiny (0)={||}

January 23rd
Desert-themed Hoenn-region Event. Regular (23) =

Shiny (0)={||}

February 9th
Sky-themed Hoenn-region Event. 19 Pokémon species including 4 forms of Castform were released, one for each weather status.

Regular (22) =

Shiny (0)={||}

March 30th
Mew became available as the reward for completing Special Research tasks.

Regular (1) =

Shiny (0)={||}

July 14th
Celebi became available for Pokémon GO Fest 2018 attendees only.

Regular (1) =

Shiny (0)={||}

August 1st
Regular (1) = Shiny (0)={||}

October 16th
Regular (26) =

Shiny (0)={||}

October 23rd
Regular (6) = Shiny (0)={||}