List of Pokémon forms by release date/2020

January
Shiny Spinda pattern 7 was released with the change of Field Research.

Shiny (1) =

January
Shiny Wurmple was released on Hatchathon 2020. Evolution of shiny Wurmple are only available after the event ended.

Shiny (1) =

January
Shiny Heatran was released with its second release.

Shiny (1) =

January
Several Unova-region Pokémon were released with the release of Trade Evolution.

Regular (35) =

January
Shiny Wurmple family was released after the end of Hatchathon 2020.

Shiny (4) =

January
Shiny Piplup became available on the twenty-fifth Community Day.

Shiny (3) =

January
Darumaka and Standard Mode Darmanitan were released on Lunar New Year 2020.

Regular (2) =

January
Scraggy was released with the release of GO Battle League.

Regular (2) =

February
Woobat was released as a Research Breakthrough reward.

Regular (2) =

February
Minccino was released on Limited Research day.

Regular (2) =

Shiny (2) =

February
Tornadus was released as a Raid Boss.

Regular (1) =

February
Shiny Riolu and Hippopotas were released on Sinnoh Celebration.

Shiny (4) =

February
Audino, Alomomola and shiny Chansey family were released on Valentine's Day 2020.

Regular (2) =

Shiny (3) =

February
Shiny Lickitung was released on Lickitung Raid Day.

Shiny (2) =

February
Shiny Rhyhorn was released on the twenty-sixth Community Day.

Shiny (3) =

March
Shiny Spinda pattern 6 was released with the change of Field Research.

Shiny (1) =

March
Thundurus was released. Unova Gold medal became achievable for the first time.

Regular (1) =

March
Shiny Darkrai and shiny Skorupi were released on Team GO Rocket Global Take-over.

Shiny (3) =

March
Shiny Timburr was released on GO Battle League Season 1 Launch Celebration and then Rufflet was released when Season 1 kicked off.

Regular (2) =

Shiny (3) =

March
Shiny Cobalion was released.

Shiny (1) =

March
Genesect and shiny Nincada were released on A Drive to Investigate.

Regular (1) =

Shiny (2) =

March
Shiny Teddiursa was released on Safari Zone in St. Louis.

Shiny (2) =

March
Gothita, Solosis and shiny Baltoy were released on Psychic Spectacular 2020.

Regular (6) =

Shiny (2) =

March
Landorus was released.

Regular (1) =

April
Stunfisk and shiny Croagunk were released on Tricky Pokémon.

Regular (1) =

Shiny (2) =

April
Shiny Exeggcute was released on Spring Event.

Shiny (2) =

April
Shiny Chinchou was released on Safari Zone in Liverpool.

Shiny (2) =

April
Shiny Volbeat and Illumise were released on Buddy Up.

Shiny (2) =

April
Shiny Abra was released on the twenty-seventh Community Day.

Shiny (3) =

May
Shiny Venonat was released on the Throwback Challenge 2020: Kanto.

Shiny (2) =

May
Shiny Voltorb was released on the Safari Zone Philadelphia. Shiny Dunsparce was released on the Throwback Challenge 2020: Johto.

Shiny (3) =

May
Shiny Virizion was released.

Shiny (1) =

May
Shiny Skitty was released on the Throwback Challenge 2020: Hoenn.

Shiny (2) =

May
Shiny Terrakion was released.

Shiny (1) =

May
Shiny Glameow was released on the Throwback Challenge 2020: Sinnoh.

Shiny (2) =

May
Shiny Seedot was released on the twenty-eighth Community Day.

Shiny (3) =

May
Reshiram was released.

Regular (1) =

June
Shiny Spinda pattern 5 was released with the change of Field Research.

Shiny (1) =

June
More Galar-region forms became available on the Throwback Challenge Champion 2020, rising up Kanto-region Pokédex to 176 distinct forms and Unova-region Pokédex to 179 distinct forms. Also Galar-region introduced 3 new Pokémon species and distinct forms.

Regular (8) =

June
Zekrom was released.

Regular (1) =

June
Galarian Farfetch'd was released.

Regular (1) =

June
Shiny Weedle was released on the twenty-ninth Community Day.

Shiny (3) =

June
Shiny Dwebble was released on Bug Out 2020.

Shiny (2) =

July
Ducklett and shiny Pidove were released on the 4th Anniversary.

Regular (2) =

Shiny (3) =

July
Kyurem was released.

Regular (1) =

July
Petilil and shiny Bellsprout were released on Summer Event.

Regular (2) =

Shiny (3) =

July
Several Pokémon were released on Pokémon GO Fest 2020.

Regular (1) =

Shiny (9) =

July
Victini was released on Pokémon GO Fest 2020.

Regular (1) =

July
Shiny Deino was released on Dragon Week.

Shiny (3) =

August
Elgyem and shiny Staryu, ULTRA Unown, and Deoxys were released on Enigma Week.

Regular (2) =

Shiny (8) =

August
Emolga, Sewaddle, Cottonee and Bouffalant and shiny Roggenrola and Genesect were released.

Regular (7) =

Shiny (4) =

August
Mega-Evolved forms were introduced for the first time with the new Mega Pokédex. The total count of distinct shiny forms rose up to 191 on Kanto-region Pokédex, to 133 on Johto-region Pokédex, to 179 on Hoenn-region Pokédex, to 143 on Sinnoh-region Pokédex and to 180 on Unova-region Pokédex. On this day, 5 Kanto-region pokémon Mega forms were released.

Regular (5) =

Shiny (5) = PS Venusaur (003) PS Charizard (006) PS Charizard (006) PS Blastoise (009) PS Beedrill (015)

September
Shiny Ledyba was released on Mega Battle Challenge.

Shiny (2) = PS Ledyba PS Ledian

September
Mega Pidgeot would be released. Sprite assets for shiny variants of Sunny, Rainy and Snowy Castform forms were added to the game. These shiny variants have been absent in the main core game series until Pokémon HOME, which was released back in February, 2020. The total count of distinct shiny forms rose up to 182 on Hoenn-region Pokédex.

Regular (1) =

Shiny (1) = PS Pidgeot

September
Shiny Porygon was released on the thirty-second Community Day.

Shiny (3) = PS Porygon (137) PS Porygon2 (233) PS Porygon-Z (474)

September
Shiny Doduo was released on Mega Buddy Challenge.

Shiny (2) = PS Doduo PS Dodrio

Future releases
Mega Houndoom would be released if Trainers have completed 275 million battles during Mega Battle Challenge. Mega Gengar will be released on Halloween 2020 in October.