List of Shiny Pokémon release dates

Shiny Pokémon were released on following dates:

2017
March: August: October: December:
 * March, 2017 – The first available Shiny Pokémon in the game – Shiny Magikarp and Gyarados began appearing.
 * It might be reference to original game series as Shiny Gyarados, located at the Lake of Rage, was the Pokémon used to introduce Trainers to shiny Pokémon.
 * August, 2017 – Shiny Pikachu, Raichu and Pichu were released on the first day of the Pokémon GO Park event, in Yokohama, Japan.
 * October, 2017 – Shiny Sableye began appearing on the first day of the Halloween event of 2017.
 * October, 2017 – Shiny Duskull and Dusclops began to appear on the seventh day of the event.
 * October, 2017 – Shiny Shuppet and Banette began to appear on the twelfth day of the event.
 * December, 2017 – Shiny Mawile and Absol began being available to catch in Raid Battle Bonus Challange, after main release of Hoenn-region Pokémon.
 * December, 2017 – Shiny Snorunt and Glalie began appearing along with release twenty Water and Ice-type Pokémon from Hoenn region and Delibird.

2018
January: February: March: April: May: June: July: August: September: October: November: December:
 * January, 2018 – Shiny Aron, Lairon and Aggron began appearing along with release of Ground and Rock-type Pokémon from Hoenn region.
 * February, 2018 – Shiny Swablu and Altaria began appearing along with release of Flying and Dragon-type Pokémon from Hoenn region.
 * February, 2018 – Shiny Luvdisc became available to catch in wild with the beginning of the Valentine's Day 2018.
 * February, 2018 – Shiny Poochyena and Mightyena became available to obtain with the start of Lunar New Year 2018.
 * February, 2018 – Shiny Dratini, Dragonair and Dragonite began appearing on the February Community Day.
 * March, 2018 – Shiny Lugia was made available to be caught in Raid Battle Bonus Challange with the second temporal release of it as a Legendary Raid Boss.
 * Shiny Lugia is the first Shiny Legendary Pokémon available in the game.
 * March, 2018 – Shiny Magby, Togepi, Wynaut and their families were released with the beginning of the Eggstravaganza 2018.
 * March, 2018 – Shiny Bulbasaur, Ivysaur and Venusaur became available on the March Community Day.
 * March, 2018 – Shiny Murkrow became available to capture with the start of April Fools' Day.
 * April, 2018 – Shiny Mareep, Flaaffy and Ampharos became available on the April Community Day.
 * April, 2018 – Shiny Wailmer and Wailord became available with the start of the Earth Day 2018.
 * May, 2018 – Shiny Makuhita, Hariyama, Meditite and Medicham became available with the start of the Battle Showdown 2018.
 * May, 2018 – Shiny Ho-Oh was made available to be caught in Raid Battle Bonus Challenge with the its second temporal release as a Legendary Raid Boss.
 * May, 2018 – Shiny Charmander, Charmeleon and Charizard became available on the May Community Day.
 * May, 2018 – Shiny Omanyte, Omastar, Kabuto, Kabutops and Aerodactyl were released with the start of the Adventure Week 2018.
 * June, 2018 – Shiny Shellder, Cloyster and Kyogre became available with the beginning of the Water Festival 2018.
 * June, 2018 – Shiny Larvitar, Pupitar and Tyranitar became available on the June Community Day.
 * June, 2018 – Shiny Roselia was released with the beginning of the Pokémon GO Safari Zone in Dortmund.
 * July, 2018 – Shiny Articuno became available to capture on the Articuno Day mini event.
 * July, 2018 – Shiny Squirtle, Wartortle and Blastoise became available on the July Community Day.
 * July, 2018 – Shiny Plusle and Minun were released with the beginning of the 2018 edition of Pokémon GO Fest 2018.
 * July, 2018 – Shiny Zapdos became available to capture on the Zapdos Day mini event.
 * August, 2018 – Shiny Snubbull, Granbull, Houndour and Houndoom became available.
 * August, 2018 – Shiny Eevee and its branched evolutionary line became available to capture on the August Community Day.
 * August, 2018 – Shiny Natu, Xatu, Sunkern, Sunflora, Pineco and Forretress became available with the start of the Johto Festival.
 * August, 2018 – Shiny Wingull and Pelipper became available with the start of the Safari Zone event in Yokosuka, Japan.
 * September, 2018 – Shiny Growlithe and Arcanine were released to the gameplay.
 * September, 2018 – Shiny Moltres became available to capture on the Moltres Day mini event.
 * September, 2018 – Shiny Geodude, Graveler, Golem, Grimer and Muk became available with the start of Ultra Bonus Event 2018.
 * September, 2018 – Shiny Chikorita, Bayleef and Meganium became available on the September Community Day.
 * October, 2018 – Shiny Krabby and Kingler became available.
 * October, 2018 – Shiny Drowzee and Hypno became available with the start of Psychic Spectacular 2018.
 * October, 2018 – Shiny Nidoran♀, Nidorina and Nidoqueen became a available in celebration of International Day of the Girl Child.
 * October, 2018 – Shiny Shinx, Luxio and Luxray were released.
 * October, 2018 – Shiny Beldum, Metang and Metagross became available on the October Community Day.
 * October, 2018 – Shiny Drifloon and Drifblim became available with the start of Halloween 2018.
 * November, 2018 – Shiny Pinsir was released with the start of Safari Zone in Tainan.
 * November, 2018 – Shiny Caterpie, Metapod and Butterfree became available.
 * November, 2018 – Shiny Gengar became available from Raid Battles during the Special Raid Challenge. After the challenge had ended, Niantic announced that Shiny Gastly became available in the wild.
 * November, 2018 – Shiny Cubone , Marowak, Alolan Marowak , Ponyta and Rapidash became available.
 * November, 2018 – Shiny Budew was released.
 * November, 2018 – Shiny Cyndaquil, Quilava and Typhlosion became available on the November Community Day.
 * November, 2018 – Shiny Elekid and Electabuzz were released with the beginning of Hatchathon 2018. Shiny forms of cross-region Pokémon Roserade, Honchkrow, Electivire, Magmortar, Togekiss and Dusknoir were released.
 * November, 2018 – Shiny Magnemite and Magneton became available with the start of Let's Go Celebration.
 * November, 2018 – Shiny Alolan Raichu became available.
 * December, 2018 – Shiny Misdreavus and Mismagius became available.
 * December, 2018 – Shiny Sandshrew and Sandslash became available during the Tottori Festival in Japan.
 * December, 2018 – Shiny Azurill, Marill, Azumarill and Delibird became available with the start of Holiday 2018.

2019
January: February: March: April: May: June: July: August: September: October: November: December:
 * January, 2019 – Shiny Totodile, Croconaw and Feraligatr became available on the January Community Day.
 * January, 2019 – Shiny Zigzagoon, Linoone, Taillow, Swellow and Groudon became available with the start of Hoenn Celebration 2019.
 * January, 2019 – Shiny Feebas and Milotic became available at the start of the January Limited Research event.
 * January, 2019 – Shiny Psyduck and Golduck became available with the start of Safari Zone in Porto Alegre.
 * January, 2019 – Shiny Froslass was released.
 * February, 2019 – Shiny Spoink and Grumpig became available with the start of Lunar New Year 2019.
 * February, 2019 – Shiny Meltan and Melmetal became available for a limited time.
 * February, 2019 – Shiny Cleffa, Clefairy, Clefable, Smoochum and Jynx became available with the start of Valentine's Day 2019.
 * February, 2019 – Shiny Swinub, Piloswine and Mamoswine became available on the February Community Day.
 * February, 2019 – Shiny Latias became available.
 * February, 2019 – Shiny Clamperl, Huntail and Gorebyss became available at the start of the February Limited Research event.
 * February, 2019 – Shiny Pidgey, Pidgeotto, Pidgeot, Rattata and Raticate became available with the start of Pokémon Day 2019.
 * March, 2019 – Shiny Mankey, Primeape, Machop, Machoke and Machamp became available with the start of Battle Showdown 2019.
 * March, 2019 – Shiny Lunatone and Solrock became available with the start of the Equinox 2019.
 * This makes them the first shiny region-exclusive Pokémon available in the game.
 * March, 2019 – Shiny Treecko, Grovyle and Sceptile became available on the March Community Day.
 * March, 2019 – Shiny Lotad, Lombre, Ludicolo, and Castform became available at the start of the March Limited Research event.
 * April, 2019 – Shiny Scyther and Scizor became available with the start of the Bug Out 2019.
 * April, 2019 – Shiny Bagon, Shelgon and Salamence became available on the April Community Day.
 * April, 2019 – Shiny Latios became available.
 * April, 2019 – Shiny Igglybuff, Jigglypuff, Wigglytuff, Buneary and Lopunny became available with the start of the Eggstravaganza 2019.
 * April, 2019 – Shiny Lapras and Shuckle became available during Safari Zone in Sentosa.
 * April, 2019 – Shiny Diglett and Dugtrio became available with the start of the Earth Day 2019.
 * May, 2019 – Shiny Seel and Dewgong became available.
 * May, 2019 – Shiny Aipom and Ambipom became available with the start of the Detective Pikachu Celebration.
 * May, 2019 – Shiny Magnezone, Leafeon and Glaceon were released.
 * May, 2019 – Shiny Torchic, Combusken and Blaziken became available on the May Community Day.
 * May, 2019 – Shiny Bronzor and Bronzong became available with the start of the Extraordinary Raid Week.
 * May, 2019 – Shiny Cresselia became available.
 * June, 2019 – Shiny Onix, Steelix, Lileep, Cradily, Anorith and Armaldo became available with the start of Adventure Week 2019.
 * June, 2019 – Shiny Slakoth, Vigoroth and Slaking became available on the June Community Day.
 * June, 2019 – Shiny Horsea, Seadra and Kingdra became available with the beginning of the 2019 edition of Chicago Pokémon GO Fest.
 * June, 2019 – Shiny families of Alolan Rattata, Sandshrew, Vulpix, Diglett, Meowth, Geodude, Grimer and Exeggutor became available with the start of 3rd Anniversary.
 * June, 2019 – Shiny Raikou became available to capture during the Special Raid Challenge.
 * July, 2019 – Shiny pattern 8 of Spinda became available.
 * July, 2019 – Shiny Nidoran♂, Nidorino and Nidoking became available with the beginning of the 2019 edition of Dortmund Pokémon GO Fest.
 * July, 2019 – Shiny Entei became available to capture during the Special Raid Challenge.
 * July, 2019 – Shiny Mudkip, Marshtomp and Swampert became available at the beginning of the July Community Day.
 * July, 2019 – Shiny Ekans, Arbok, Zubat, Golbat, Koffing, Weezing, Crobat, Sneasel and Weavile became available at the launch of Team GO Rocket Disruption.
 * July, 2019 – Shiny Rayquaza became available.
 * August, 2019 – Shiny Ralts, Kirlia, Gardevoir and Gallade became available at the beginning of the August Community Day.
 * August, 2019 – Shiny Bonsly and Sudowoodo became available at the beginning of the Gift Event.
 * August, 2019 – Shiny Poliwag, Poliwhirl, Poliwrath and Politoed became available at the beginning of the 2019 Pokémon GO Fest in Yokohama, Japan.
 * August, 2019 – Shiny Suicune became available to capture during the Special Raid Challenge.
 * August, 2019 – Shiny Carvanha, Sharpedo, Barboach and Whiscash became available with the start of Water Festival 2019.
 * September, 2019 – Shiny Electrike, Manectric and pattern 3 of Spinda became available.
 * September, 2019 – Shiny Sentret, Furret, Gligar and Gliscor became available at the beginning of the Johto Journey.
 * September, 2019 – Shiny Farfetch'd , Kangaskhan, Mr. Mime, and Tauros became available at the beginning of the second week of the Ultra Bonus Event 2019.
 * September, 2019 – Shiny Turtwig, Grotle and Torterra became available at the beginning of the September Community Day.
 * September, 2019 – Shiny Mewtwo, families of Patrat, Lillipup and Klink became available at the beginning of the third week of the Ultra Bonus Event.
 * September, 2019 – Shiny Yanma and Yanmega became available with the start of Safari Zone in Montreal.
 * September, 2019 – Shiny Altered Forme Giratina became available in Legendary Raid Battles.
 * September, 2019 – Shiny Zangoose, Seviper and Mime Jr. became available at the beginning of the World Tourism Day.
 * October, 2019 – Shiny Oddish family became available at the beginning of Safari Zone in New Taipei City.
 * October, 2019 – Shiny Trapinch, Vibrava and Flygon became available at the beginning of the October Community Day.
 * October, 2019 – Shiny Yamask and Cofagrigus became available with the beginning of Halloween 2019 event.
 * November, 2019 – Shiny Skarmory, Regirock, Regice and Registeel became available with the beginning of A Colossal Discovery. Shiny pattern 1 of Spinda also became available.
 * November, 2019 – Shiny Meowth and Persian became available with the beginning of Team GO Rocket Leaders Disruption.
 * November, 2019 – Shiny Chimchar, Monferno and Infernape became available at the beginning of the November Community Day.
 * November, 2019 – Shiny Tentacool and Tentacruel became available with the beginning of Supereffective Week.
 * December, 2019 – All shiny forms of Burmy, Wormadam and Mothim became available with the beginning of the Evolution Event.
 * December, 2019 – Shiny forms of Gible, Gabite and Garchomp became available with the Pokémon egg shuffle.
 * December, 2019 – Shiny Stantler, Snover and Abomasnow became available with the beginning of the Holiday 2019 event.

2020
January: February: March: April: May: June: July: August: September: October: November: December:
 * January, 2020 – Shiny pattern 7 of Spinda became available.
 * January, 2020 – Shiny Wurmple became available with the beginning of the Hatchathon 2020. However, its shiny evolution was not available yet because party hat Wurmple cannot evolve.
 * January, 2020 – Shiny Heatran became available.
 * January, 2020 – Shiny Silcoon, Beautifly, Cascoon and Dustox became available after the end of Hatchathon event.
 * January, 2020 – Shiny Piplup, Prinplup and Empoleon became available at the beginning of the January Community Day.
 * February, 2020 – Shiny Minccino and Cinccino became available at the start of the Limited Research.
 * February, 2020 – Shiny Riolu, Lucario, Hippopotas and Hippowdon became available at the start of the Sinnoh Celebration 2020.
 * February, 2020 – Shiny Happiny, Chansey and Blissey became available at the start of the Valentine's Day 2020.
 * February, 2020 – Shiny Lickitung and Lickilicky became available during the Special Raid Challenge of the Valentine's Day event.
 * February, 2020 – Shiny Rhyhorn, Rhydon and Rhyperior became available on the February Community Day.
 * March, 2020 – Shiny pattern 6 of Spinda became available.
 * March, 2020 – Shiny Darkrai became available on Special Raid Weekend.
 * March, 2020 – Shiny Skorupi and Drapion became available during Team GO Rocket Global Take-over.
 * March, 2020 – Shiny Timburr, Gurdurr and Conkeldurr became available at the start of the GO Battle League Season 1 Launch Celebration.
 * March, 2020 – Shiny Cobalion became available.
 * March, 2020 – Shiny Nincada and Ninjask became available during A Drive to Investigate.
 * March, 2020 – Shiny Teddiursa and Ursaring became available at the beginning of the Safari Zone in St. Louis.
 * March, 2020 – Shiny Baltoy and Claydol became available during the Psychic Spectacular 2020.
 * April, 2020 – Shiny Croagunk and Toxicroak became available during the Tricky Pokémon.
 * April, 2020 – Shiny Exeggcute and Exeggutor became available at the start of the Spring Event.
 * April, 2020 – Shiny Chinchou and Lanturn became available at the beginning of the Safari Zone in Liverpool.
 * April, 2020 – Shiny Volbeat and Illumise became available at the start of the Buddy Up.
 * April, 2020 – Shiny Abra, Kadabra and Alakazam became available on the April Community Day.
 * May, 2020 – Shiny Venonat and Venomoth became available at the start of the Throwback Challenge 2020: Kanto.
 * May, 2020 – Shiny Dunsparce became available at the start of the Throwback Challenge 2020: Johto.
 * May, 2020 – Shiny Voltorb and Electrode became available at the start of the Philadelphia Safari Zone.
 * May, 2020 – Shiny Virizion became available.
 * May, 2020 – Shiny Skitty and Delcatty became available at the start of the Throwback Challenge 2020: Hoenn.
 * May, 2020 – Shiny Terrakion became available.
 * May, 2020 – Shiny Glameow and Purugly became available at the start of the Throwback Challenge 2020: Sinnoh.
 * May, 2020 – Shiny Seedot, Nuzleaf and Shiftry became available on the May Community Day.
 * June, 2020 – Shiny pattern 5 of Spinda became available.
 * June, 2020 – Shiny Weedle, Kakuna and Beedrill became available on the June Community Day.
 * June, 2020 – Shiny Dwebble and Crustle became available at the start of the Bug Out 2020.
 * July, 2020 – Shiny Pidove, Tranquill and Unfezant became available at the start of the 4th Anniversary.
 * July, 2020 - Shiny Bellsprout, Weepinbell and Victreebel became available at the start of the Summer Event.
 * July, 2020 – Shiny Tangela, Tangrowth, G and O Unown, Qwilfish, Woobat, Swoobat, Heatmor and Durant became available at the start of Pokémon GO Fest 2020.
 * July, 2020 – Shiny Deino, Zweilous and Hydreigon became available at the start of the Dragon Week.
 * August, 2020 – Shiny Staryu, Starmie; A, L, R, T, and U Unown; and Normal Forme Deoxys became available at the start of the Enigma Week.
 * August, 2020 – Shiny Roggenrola, Boldore, Gigalith and Genesect became available at the start of the Unova Week.
 * September, 2020 – Shiny pattern 2 of Spinda became available.
 * September, 2020 - Shiny Ledyba and Ledian became available at the start of the Mega Battle Challenge.
 * September, 2020 - Shiny Porygon, Porygon2 and Porygon-Z became available on the September Community Day.
 * September, 2020 - Shiny Doduo and Dodrio became available at the start of the Mega Buddy Challenge.
 * October, 2020 - Shiny Kricketot and Kricketune became available at the start of the Fashion Week.
 * October, 2020 - Shiny Vulpix and Ninetales became available at the start of the The Seasons Change.
 * October, 2020 - Shiny Origin Forme Giratina became available.
 * October, 2020 - Shiny Spiritomb became available at the start of the Halloween 2020.
 * November, 2020 – Shiny pattern 4 of Spinda became available.
 * November, 2020 - Shiny Ferroseed and Ferrothorn became available at the start of the Pokémon GO Special Weekend.
 * November, 2020 - Shiny Slowpoke, Slowbro and Slowking became available at the start of the Pokémon HOME Event.
 * November, 2020 - Shiny C Unown became available at the start of the Pokémon GO City Spotlight.
 * November, 2020 - Shiny Goldeen and Seaking became available at the start of the Lake Legends Event.
 * December, 2020 - Shiny Wooper and Quagsire became available at the start of the Wooper Watch.
 * December, 2020 - Shiny Celebi, Rufflet and Braviary became available at the start of the Secrets of the Jungle Event.
 * December, 2020 - Shiny Cubchoo and Beartic became available at the start of the Galarian Mr. Mime Event.

2021
January:
 * January, 2021 - Shiny Snivy, Servine and Serperior became available at the start of the Unova Celebration Event.
 * January, 2021 - Shiny Buizel and Floatzel became available at the start of the Sinnoh Celebration Event.
 * January, 2021 - Shiny Miltank became available at the start of the Johto Celebration Event.