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.

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.

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 event.

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 event. 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.

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.

Shiny (5) =

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

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.

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. 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)=