List of Pokémon forms by release date/2019

By the start of 2019, the number of released forms was:

In 2019, the following medals became achievable for the first time:
 * Sinnoh Gold Sinnoh Gold.png.
 * Unova Bronze Unova Bronze.png.

The total number of Pokémon species and Pokémon distinct forms (regular and shiny) was updated according to the following events in 2019:

January 1st
Pattern 5 of Spinda was available in field research.

Regular (1) =

January 12th
Shiny Totodile became available on the 13th Community Day.

Shiny (3) =

January 15th
Shiny Zigzagoon, Taillow and Groudon became available for the first time during Hoenn Celebration 2019.

Shiny (5) =

January 19th
Shiny Feebas became available during Limited Research.

Shiny (2) =

January 25th
Shiny Psyduck became available on Safari Zone Porto Alegre.

Shiny (2) =

January 29th
Palkia became available as Raid Boss for the first time.

Regular (1) =

January 31st
More Sinnoh Region Pokémon became available.

Regular (15) = Shiny (1) =

February 4th
Shiny Spoink became available on Lunar New Year 2019.

Shiny (2) =

February 5th
Shiny Meltan became available for a limited time.

Shiny (2) =

February 13th
Happiny and Shiny Cleffa and Smoochum became available on Valentine's Day 2019. Spinda with heart-shaped pattern was released. Later this pattern was registered in the Pokédex as pattern #9, rising up Hoenn-region Pokédex to 149 distinct forms.

Regular (1) = Shiny (5) =

February 16th
Mamoswine and its Shiny family became available on the 14th Community Day.

Regular (1) = Shiny (3) =

February 22nd
Shiny Latias became available in the Special Raid Week.

Shiny (1) =

February 23rd
Clamperl family became available available during Limited Research, together with shiny forms.

Regular (3) = Shiny (3) =

February 25th
Smeargle became available via GO Snapshot. All Johto-region Pokémon species were released, becoming the second region to be possible to complete the Pokédex.

Regular (1) =

February 26th
Shiny Pidgey and Rattata were released in Pokémon Day 2019.

Shiny (5) =

March 1st
Dialga became available as Raid Boss for the first time. Pattern 2 of Spinda was released in field research. Sinnoh Gold medal became achievable for the first time.

Regular (2) =

March 5th
Shiny Mankey and Machop were released on Battle Showdown 2019.

Shiny (5) =

March 19th
Shiny Lunatone and Solrock were released on Equinox 2019.

Shiny (2) =

March 23rd
Shiny Treecko became available on the 15th Community Day.

Shiny (3) =

March 27th
Deoxys Defense Forme became available to be battled exclusively in EX Raid Battle.

Regular (1) =

March 30th
Shiny Lotad and Castform became available during Limited Research.

Shiny (4) =

April 2nd
Shiny Scyther was released on Bug Out. Origin Giratina became available as Raid Boss for the first time.

Regular (1) = Shiny (2) =

April 13th
Shiny Bagon became available on the 16th Community Day.

Shiny (3) =

April 15th
Shiny Latios became available in the Special Raid Week.

Shiny (1) =

April 16th
Shiny Igglybuff and Buneary were released on Eggstravaganza 2019.

Shiny (5) =

April 18th
Shiny Lapras and Shuckle became available on Safari Zone in Sentosa.

Shiny (2) =

April 29th
Shiny Diglett family became available on Earth Day 2019. The Lake Guardians were released in wild.

Regular (3) = Shiny (2) =

May 1st
Pattern 4 of Spinda was available in field research. Shiny Seel was released.

Regular (1) = Shiny (2)=

May 7th
Shiny Aipom were released on Detective Pikachu Celebration.

Shiny (2) =

May 17th
Several Sinnoh-region Pokémon were released, featuring new Lure Modules as an evolution method.

Regular (23) = Shiny (3)=

May 19th
Shiny Torchic became available on the 17th Community Day.

Shiny (3) =

May 21st
Shiny Bronzor were released on Extraordinary Raid Week.

Shiny (2) =

May 27th
Shiny Cresselia became available.

Shiny (1) =

June 4th
Shiny Onix, Lileep and Anorith were released on Adventure Week 2019.

Shiny (6) =

June 8th
Shiny Slakoth became available on the 18th Community Day.

Shiny (3) =

June 13th
Shiny Horsea became available with the start of Chicago Pokémon GO Fest 2019. Jirachi was available for attendees.

Regular (1) = Shiny (3) =

June 28th
Shiny Alolan Rattata, Sandshrew, Vulpix, Diglett, Meowth, Geodude, Grimer and Exeggutor were released on 3rd Anniversary.

Shiny (16) =

June 29th
Shiny Raikou was released on Special Raid Challenge.

Shiny (1) =

July 1st
Deoxys Speed Forme became available to be battled exclusively in EX Raid Battle. Shiny pattern 8 of Spinda was released.

Regular (1) = Shiny (1) =

July 4th
Shiny Nidoran♂ became available with the start of Dortmund Pokémon GO Fest 2019.

Shiny (3) =

July 10th
Armored Mewtwo became available as Raid Boss for the first time, rising up Kanto-region Pokédex to 170 distinct forms.

Regular (1) =

July 14th
Shiny Entei was released on Special Raid Challenge.

Shiny (1) =

July 21st
Shiny Mudkip became available on the 19th Community Day.

Shiny (3) =

July 25th
Shiny Ekans, Zubat, Koffing and Sneasel became available on the Team GO Rocket Disruption.

Shiny (9) =

July 31st
Shiny Rayquaza became available.

Shiny (1) =

August 3rd
Shiny Ralts became available on the 20th Community Day.

Shiny (4) =

August 5th
Shiny Bonsly became available with the start of Gift Event.

Shiny (2) =

August 6th
Shiny Poliwag became available with the start of Yokohama Pokémon GO Fest 2019.

Shiny (4) =

August 17th
Shiny Suicune was released on Special Raid Challenge.

Shiny (1) =

August 23rd
Shiny Carvanha and Barboach were released on Water Festival 2019.

Shiny (4) =

September 1st
Shiny Electrike and pattern 3 of Spinda were released.

Shiny (3) =

September 2nd
Shiny Sentret and Gligar were released on Johto Journey.

Shiny (4) =

September 9th
Shiny Farfetch'd, Kangaskhan, Mr. Mime and Tauros were released on the second week of Ultra Bonus Event 2019.

Shiny (4) =

September 15th
Shiny Turtwig became available on the 21st Community Day.

Shiny (3) =

September 16th
Main release of Unova Region. Shiny Mewtwo released.

Regular (48) = Shiny (9) =