By the start of 2020, the number of released forms was:
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In 2020, the following medals became achievable for the first time:
January 1st
Shiny Spinda pattern 7 was released with the change of Field Research.
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January 2nd
Shiny Wurmple was released on Hatchathon 2020. Evolution of shiny Wurmple are only available after the event ended.
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January 7th
Shiny Heatran was released with its second release.
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January 10th
Several Unova-region Pokémon were released with the release of Trade Evolution.
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January 16th
Shiny Wurmple family was released after the end of Hatchathon 2020.
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January 19th
Shiny Piplup became available on the twenty-fifth Community Day.
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January 24th
Darumaka and Standard Mode Darmanitan were released on Lunar New Year 2020.
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January 29th
Scraggy was released with the release of GO Battle League.
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February 1st
Woobat was released as a Research Breakthrough reward.
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February 2nd
Minccino was released on Limited Research day.
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February 4th
Tornadus was released as a Raid Boss.
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February 7th
Shiny Riolu and Hippopotas were released on Sinnoh Celebration.
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February 14th
Audino, Alomomola and shiny Chansey family were released on Valentine's Day 2020.
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February 15th
Shiny Lickitung was released on Lickitung Raid Day.
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February 22nd
Shiny Rhyhorn was released on the twenty-sixth Community Day.
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March 1st
Shiny Spinda pattern 6 was released with the change of Field Research.
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March 2nd
Thundurus was released. Unova Gold medal became achievable for the first time.
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March 6th
Shiny Darkrai and shiny Skorupi were released on Team GO Rocket Global Take-over.
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March 13th
Shiny Timburr was released on GO Battle League Season 1 Launch Celebration and then Rufflet was released when Season 1 kicked off.
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March 17th
Shiny Cobalion was released.
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March 20th
Genesect and shiny Nincada were released on A Drive to Investigate.
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March 26th
Shiny Teddiursa was released on Safari Zone in St. Louis.
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March 27th
Gothita, Solosis and shiny Baltoy were released on Psychic Spectacular 2020.
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March 31st
Landorus was released.
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April 1st
Stunfisk and shiny Croagunk were released on Tricky Pokémon.
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April 9th
Shiny Exeggcute was released on Spring Event.
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April 17th
Shiny Chinchou was released on Safari Zone in Liverpool.
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April 21st
Shiny Volbeat and Illumise were released on Buddy Up.
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April 25th
Shiny Abra was released on the twenty-seventh Community Day.
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May 1st
Shiny Venonat was released on the Throwback Challenge 2020: Kanto. Template:FormcountTable
May 8th
Shiny Voltorb was released on the Safari Zone Philadelphia. Shiny Dunsparce was released on the Throwback Challenge 2020: Johto. Template:FormcountTable
May 12th
Shiny Virizion was released. Template:FormcountTable
May 15th
Shiny Skitty was released on the Throwback Challenge 2020: Hoenn. Template:FormcountTable
May 19th
Shiny Terrakion was released. Template:FormcountTable
May 22nd
Shiny Glameow was released on the Throwback Challenge 2020: Sinnoh. Template:FormcountTable
May 24th
Shiny Seedot was released on the twenty-eighth Community Day. Template:FormcountTable
May 26th
Reshiram was released. Template:FormcountTable
June 3rd
Several Galarian forms will be released on the Throwback Challenge Champion 2020. Galarian Farfetch'd and its evolution Sirfetch'd were added with the other Galarian forms to the game code, but haven't been officialy confirmed by Niantic yet.
June 20th
Shiny Weedle will be released on the twenty-ninth Community Day.