List of Pokémon forms by release date/2020

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

Shiny (1) =

January
Shiny Wurmple was released at the start of 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 along with the release of Trade Evolution.

Regular (35) =

January
Shiny Wurmple family was released after 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 at the start of Lunar New Year 2020.

Regular (2) =

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

Regular (2) =

February
Woobat was released as a Research Breakthrough reward.

Regular (2) =

February
Minccino was released at the start of Minccino Limited Research.

Regular (2) =

Shiny (2) =

February
Tornadus was released as a Raid Boss.

Regular (1) =

February
Shiny Riolu and Hippopotas were released at the start of Sinnoh Celebration 2020.

Shiny (4) =

February
Audino, Alomomola and shiny Chansey family were released at the start of Valentine's Day 2020.

Regular (2) =

Shiny (3) =

February
Shiny Lickitung was released at the start of Lickitung Raid Day.

Shiny (2) =

February
Shiny Rhyhorn was released at the start of the twenty-sixth Community Day.

Shiny (3) =

March
Shiny Spinda pattern 6 was released along 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 at the start of Team GO Rocket Global Take-over.

Shiny (3) =

March
Shiny Timburr was released at the start of 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 at the start of A Drive to Investigate.

Regular (1) =

Shiny (2) =

March
Shiny Teddiursa was released at the start of Pokémon GO Safari Zone St. Louis.

Shiny (2) =

March
Gothita, Solosis and shiny Baltoy were released at the start of Psychic Spectacular 2020.

Regular (6) =

Shiny (2) =

March
Landorus was released.

Regular (1) =

April
Stunfisk and shiny Croagunk were released at the start of Tricky Pokémon 2020.

Regular (1) =

Shiny (2) =

April
Shiny Exeggcute was released at the start of Spring Event.

Shiny (2) =

April
Shiny Chinchou was released at the start of Pokémon GO Safari Zone Liverpool.

Shiny (2) =

April
Shiny Volbeat and Illumise were released at the start of Buddy Up.

Shiny (2) =

April
Shiny Abra was released at the start of the April 2020 Community Day.

Shiny (3) =

May
Shiny Venonat was released at the start of Throwback Challenge 2020: Kanto.

Shiny (2) =

May
Shiny Voltorb was released at the start of Pokémon GO Safari Zone Philadelphia. Shiny Dunsparce was released at the start of Throwback Challenge 2020: Johto.

Shiny (3) =

May
Shiny Virizion was released.

Shiny (1) =

May
Shiny Skitty was released at the start of Throwback Challenge 2020: Hoenn.

Shiny (2) =

May
Shiny Terrakion was released.

Shiny (1) =

May
Shiny Glameow was released at the start of Throwback Challenge 2020: Sinnoh.

Shiny (2) =

May
Shiny Seedot was released at the start of May 2020 Community Day.

Shiny (3) =

May
Reshiram was released.

Regular (1) =

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

Shiny (1) =

June
More Galar-region forms were added to game files (Meowth, Farfetch'd, Darumaka, Standard and Zen Darmanitan and Stunfisk), rising up Kanto-region Pokédex to 172 distinct forms and Unova-region Pokédex to 179 distinct forms. Also Galar-region introduced 3 new Pokémon species and distinct forms. Galarian Meowth, Zigzagoon, Darumaka, and Stunfisk were released at the start of Throwback Challenge Champion 2020.

Regular (8) =

June
Zekrom was released.

Regular (1) =

June
Galarian Farfetch'd was released at the start of Galarian Farfetch'd Event.

Regular (1) =

June
Shiny Weedle was released at the start of the June 2020 Community Day.

Shiny (3) =

June
Shiny Dwebble was released at the start of Bug Out 2020.

Shiny (2) =

July
Ducklett and shiny Pidove were released at the start of 4th Anniversary.

Regular (2) =

Shiny (3) =

July
Kyurem was released.

Regular (1) =

July
More Galar-region forms were added to game files (Ponyta, Rapidash, Slowpoke, Slowbro, Mr. Mime, Corsola and Yamask), rising up Kanto-region Pokédex to 177 distinct forms, Johto-region Pokédex to 128 distinct forms, and Unova-region Pokédex to 180 distinct forms.

July
Petilil and shiny Bellsprout were released at the start of Summer Event.

Regular (2) =

Shiny (3) =

July
Several Pokémon were released at the start of Pokémon GO Fest 2020.

Regular (1) =

Shiny (9) =

July
Victini was released at the start of the second day of Pokémon GO Fest 2020.

Regular (1) =

July
Shiny Deino was released at the start of Dragon Week.

Shiny (3) =

August
Elgyem and shiny Staryu, ULTRA Unown, and Deoxys were released at the start of Enigma Week.

Regular (2) =

Shiny (8) =

August
Emolga, Sewaddle, Cottonee and Bouffalant and shiny Roggenrola and Genesect were released at the start of Unova Week.

Regular (7) =

Shiny (4) =

August
Mega-Evolved forms were released for the first time along with the new Mega Pokédex.

Regular (5) =

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

September
Shiny Spinda pattern 2 was released along with the change of Field Research.

Shiny (1) =

September
Shiny Ledyba was released at the start of Mega Battle Challenge.

Shiny (2) = PS Ledyba PS Ledian

September
Mega Pidgeot was released after Trainers had won 2 million Mega Raids in Mega Raid Challenge. 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 at the start of the September 2020 Community Day.

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

September
Shiny Doduo was released at the start of Mega Buddy Challenge.

Shiny (2) = PS Doduo PS Dodrio

September
Mega Houndoom was released after Trainers completed 275 million battles in Mega Battle Challenge.

Regular (1) =

Shiny (1) = PS Houndoom

October
Shiny Kricketot was released at the start of Fashion Week 2020.

Shiny (2) = PS Kricketot PS Kricketune

October
Autumn Deerling and shiny Vulpix were released at the start of Autumn Event. Shiny Origin Forme Giratina was also released.

Regular (2) =

Shiny (3) = PS Vulpix PS Ninetales PS Giratina

October
Pawniard, Sandile and Vullaby were released at the start of The Seasons Change: Part 2.

Regular (7) =

October
Galarian Ponyta and Sirfetch'd were released at the start of The Crown Tundra Event.

Regular (3) =

October
Galar-region introduced 1 new Pokémon species and distinct forms (Runerigus). Galarian Yamask, shiny Spiritomb and Mega Gengar were released at the start of Halloween 2020.

Regular (3) =

Shiny (2) = PS Gengar PS Spiritomb

November
Shiny Spinda pattern 4 was released along with the change of Field Research.

Shiny (1) =

November
Shiny Ferroseed was released at the start of Pokémon GO Special Weekend.

Shiny (2) = PS Ferroseed (597) PS Ferrothorn (598)

November
Shiny Slowpoke was released at the start of Pokémon HOME Event.

Shiny (3) = PS Slowpoke (079) PS Slowbro (080) PS Slowking (199)

November
Shiny C Unown was released at the start of Pokémon GO City Spotlight.

Shiny (1) =

November
Shiny Goldeen was released at the start of Lake Legends Event.

Shiny (2) = PS Goldeen (118) PS Seaking (119)

November
Espurr was released along with the GO Beyond update. Kanto Platinum and Johto Platinum  became achievable for the first time. Kalos-region Pokédex introduced 72 new Pokémon species, 124 distinct forms and 1 Mega Form.

Regular (2) =

December
Summer and Winter Deerling forms were released at the start of Season of Celebration. Mega Abomasnow was also released.

Regular (5) =

Shiny (1) = PS Abomasnow

December
Several Kalos-region Pokémon were released at the start of Kalos Launch Event. Kalos Bronze medal became achievable for the first time.

Regular (19) =

December
Shiny Wooper was released at the start of Wooper Watch.

Shiny (2) = PS Wooper PS Quagsire

December
Shiny Celebi and Rufflet were released at the start of Secrets of the Jungle Event 2020.

Shiny (3) = PS Celebi PS Rufflet PS Braviary

December
Shiny Cubchoo was released at the start of Galarian Mr. Mime Event.

Shiny (2) = PS Cubchoo PS Beartic

December
Galar-region introduced 1 new Pokémon species and distinct forms (Mr. Rime). Galarian Mr. Mime was released through Tap... Tap... Tappity-Tap... Special Research.

Regular (2) =

December
Vanillite was released at the start of Holiday 2020.

Regular (3) =