List of Pokémon forms by release date

This list includes:
 * New Pokémon species released.

This list doesn't include:
 * New Pokémon forms released. For reference go to List of Pokémon with different forms.
 * Pokémon gender differences. Both genders are made available when the Pokémon form is released. For reference go to List of Pokémon gender differences.
 * Pokémon wearing event-themed pieces of clothes. For reference go to Events.

July 6th
Main release of Kanto-region. Regular (145) =

November 23rd
Ditto release.

Regular (1) =

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

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) =

March 24th
2017 Water Festival. First shiny Pokémon to be released. Shiny (2) =

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) =

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

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

Regular (1) =

August 9th
Pokémon GO Park. Shiny (3) =

August 14th
Mewtwo was confirmed as a Raid Boss.

Regular (1) =

August 31st
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) =

October 20th
2017 Halloween event, with only shiny form of Sableye was released at the start. Regular (5) = Shiny (1) =

October 26th
Shiny form of Duskull was released. Shiny (2) =

October 31st
Shiny form of Shuppet was released. Shiny (2) =

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) =

December 8th
Main release of Hoenn-region. Regular (50) = Shiny (2)=

December 15th
Groudon is released as the 5th tier Raid Boss. Regular (1) =

December 21st
2017 Holiday Event - Aquatic-themed Hoenn-region Event. Regular (21) = Shiny (2)=

January 12th
Kyogre was available to be defeated and caught in Raid Battle for the first time. Regular (1) =

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

Shiny (3)=

February 9th
Sky-themed Hoenn-region Event. 20 Pokémon species including 4 forms of Castform were released, one for each weather status. Rayquaza was available to be defeated and caught in Raid Battle for the first time.

Regular (23) =

Shiny (2)=

February 13th
2018 Valentine's Day

Shiny (1) =

February 15th
Lunar New Year

Shiny (2) =

February 24th
Second Community Day.

Shiny (3) =

March 15th
Shiny form of Lugia was released with the second release of it as a Raid Boss. Lugia was the first Legendary Pokémon with its shiny form released in the game.

Shiny (1) =

March 22nd
2018 Eggstravaganza.

Shiny (6) =

March 25th
Third Community Day.

Shiny (3) =

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

Regular (1) =

March 31st
April Fools' Day

Shiny (1) =

April 2nd
Latios was able to be defeated and captured across the Americas and Africa for the first time while Latias was in Europe and Asia.

Regular (2) =

April 15th
Fourth Community Day

Shiny (3) =

April 22nd
Earth Day

Shiny (2) =

May 1st
Battle Showdown

Shiny (4) =

May 19th
Fifth Community Day. Shiny form of Ho-Oh was released with the second release of it as a Raid Boss. Shiny (4) =

May 24th
2018 Adventure Week.

Shiny (5) =

May 29th
Alolan Exeggutor was released. Regular (1) =

June 7th
2018 Water Festival Shiny (3) =

June 12th
E3 Regular (1) =

June 16th
Sixth Community Day. Shiny (3) =

June 22nd
Regice was available to be defeated and caught in Raid Battle for the first time. Alolan variants of Vulpix, Sandshrew, Meowth, Grimer and their evolutionary lines were made available to hatch from 7-km Eggs. Regular (9) =

June 23rd
Alolan Rattata became available to be caught in the wild. Regular (2) =

June 30th
Pokémon GO Safari Zone in Dortmund

Shiny (1) =

July 7th
Articuno Day Shiny (1) =

July 8th
Seventh Community Day. Shiny (3) =

July 14th
Pokémon GO Fest 2018

Regular (7) = Shiny (2) =

July 20th
Registeel was available to be defeated and caught in Raid Battle for the first time. Alolan variants of Raichu and Marowak were made available to be defeated and caught in Raid Battle. Regular (3) =

July 21st
Zapdos Day Shiny (1) =

August 1st
Pattern 8 of Spinda was available in field research: "Land 3 Curveball throws in a row". Shiny form of Snubbull and Houndour were released. Regular (1) = Shiny (4)=

August 11th
Eighth Community Day.

Shiny (6) =

August 17th
Regirock was available to be defeated and caught in Raid Battle for the first time. Regular (1) =

August 20th
Johto Festival Shiny (6) =

August 29th
Pokémon GO Safari Zone in Yokosuka

Shiny (2) =

September 1st
Pattern 3 of Spinda was available in field research: "Make a Great Curveball throw". Shiny form of Growlithe was released. Regular (1) = Shiny (2)=

September 8th
Moltres Day Shiny (1) =

September 14th
Ultra Bonus Event. Shiny (5)=

September 22nd
Ninth Community Day. Shiny (3)=

October 1st
Pattern 1 of Spinda was available in field research: "Make 2 Nice Curveball Throws". Deoxys became available to be battled exclusively in EX Raid Battles. Shiny form of Krabby was released. Regular (2) = Shiny (2)=

October 5th
Psychic Spectacular Shiny (2) =

October 11th
Female Day

Shiny (3) =

October 16th
Main release of Sinnoh-region.

Regular (26) = Shiny (3)=

October 21st
Tenth Community Day

Shiny (3) =

October 23rd
Halloween event. Spiritomb was made available from event-exclusive Special Research task series. Giratina was released as Legendary Raid Boss for the first time.

Regular (6) = Shiny (2)=