List of Pokémon forms by release date/2019

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

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 in field 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.

Regular (1) = Shiny (5) =

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

Regular (1) = Shiny (3) =