List of Pokémon forms by release date/2018

January
Kyogre was released as a Raid Boss.

Regular (1) =

January
Release of Hoenn-region Desert-themed Pokémon. Shiny Aron was released.

Regular (23) =

Shiny (3)=

February
Release of Hoenn-region Sky-themed Pokémon including 4 forms of Castform at the start of Hoenn Celebration 2018. Shiny Swablu was released. Rayquaza was released as a Raid Boss.

Regular (23) =

Shiny (2)=

February
Shiny Luvdisc was released at the start of Valentine's Day 2018.

Shiny (1) =

February
Shiny Poochyena was released at the start of Lunar New Year 2018.

Shiny (2) =

February
Shiny Dratini was released at the start of the second Community Day.

Shiny (3) =

March
Shiny Lugia was released with its second release as the first Shiny Legendary Pokémon available in the game.

Shiny (1) =

March
Shiny Togepi, Magby and Wynaut were released at the start of Eggstravaganza 2018.

Shiny (6) =

March
Shiny Bulbasaur was released at the start of the third Community Day.

Shiny (3) =

March
Mew was released at the start of A Mythical Discovery Special Research. All Kanto-region Pokémon species were released, becoming the first region to be possible to complete the Pokédex.

Regular (1) =

March
Shiny Murkrow was released at the start of April Fools' Day.

Shiny (1) =

April
Latios and Latias were released as Raid Bosses.

Regular (2) =

April
Shiny Mareep was released at the start of the fourth Community Day.

Shiny (3) =

April
Shiny Wailmer was released at the start of Earth Day 2018.

Shiny (2) =

May
Shiny Makuhita and Meditite were released at the start of Battle Showdown 2018.

Shiny (4) =

May
Shiny Charmander was released at the start of the fifth Community Day. Shiny Ho-Oh was released with its second release.

Shiny (4) =

May
Shiny Omanyte, Kabuto and Aerodactyl were released at the start of Adventure Week 2018.

Shiny (5) =

May
Alolan Exeggutor was released at the start of the Alolan Exeggutor Event. Alolan-region forms became available rising up Kanto-region Pokédex to 169 distinct forms.

Regular (1) =

June
Shiny Shellder and Kyogre were released on Water Festival 2018.

Shiny (3) =

June
Exclamation mark Unown was released at the start of E3 2018.

Regular (1) =

June
Shiny Larvitar was released at the start of the sixth Community Day.

Shiny (3) =

June
Regice was released as a Raid Boss. Alolan forms of Sandshrew, Vulpix, Meowth, Grimer were released along with the Friends mechanic.

Regular (9) =

June
Alolan Rattata was released in the wild.

Regular (2) =

June
Shiny Roselia was released at the start of Pokémon GO Safari Zone Dortmund.

Shiny (1) =

July
Shiny Articuno was released at the start of Articuno Day.

Shiny (1) =

July
Shiny Squirtle was released at the start of the seventh Community Day.

Shiny (3) =

July
Alolan forms of Diglett and Geodude, and shiny Plusle and shiny Minun were released at the start of Pokémon GO Fest 2018. Question mark Unown and Celebi were released for attendees. All Unown forms were released.

Regular (7) =

Shiny (2) =

July
Registeel was released as a Raid Boss. Alolan forms of Raichu and Marowak were released as Raid Bosses. All Alolan variants were released.

Regular (3) =

July
Shiny Zapdos was released at the start of Zapdos Day.

Shiny (1) =

August
Spinda pattern 8 was released along with the change of Field Research. Shiny Snubbull and Houndour were released.

Regular (1) =

Shiny (4)=

August
Shiny Eevee was released at the start of the eighth Community Day.

Shiny (6) =

August
Regirock was released as a Raid Boss.

Regular (1) =

August
Shiny Natu, Sunkern and Pineco were released at the start of Johto Festival.

Shiny (6) =

August
Shiny Wingull was released at the start of Pokémon GO Safari Zone Yokosuka.

Shiny (2) =

September
Spinda pattern 3 of was released along with the change of Field Research. Shiny Growlithe was released.

Regular (1) =

Shiny (2)=

September
Shiny Moltres was released at the start of Moltres Day.

Shiny (1) =

September
Shiny Geodude and Grimer were released at the start of Ultra Bonus Event 2018.

Shiny (5)=

September
Shiny Chikorita was released at the start of the ninth Community Day.

Shiny (3)=

October
Spinda pattern 1 was released along with the change of Field Research. Shiny Krabby was released. Deoxys was released as a Raid Boss in EX Raid Battles.

Regular (2) =

Shiny (2)=

October
Shiny Drowzee was released at the start of Psychic Spectacular 2018.

Shiny (2) =

October
Shiny Nidoran♀ was released at the start of Female Day.

Shiny (3) =

October
Main release of Sinnoh-region. Shiny Shinx was released. Sinnoh-region Pokédex introduced 107 new Pokémon species and 138 distinct forms. Sinnoh Bronze medal became achievable for the first time.

Regular (26) =

Shiny (3)=

October
Shiny Beldum was released at the start of the tenth Community Day.

Shiny (3) =

October
Spiritomb was released at the start of A Spooky Message Special Research. Giratina was released on Halloween 2018. Stunky and shiny Drifloon were released. Sinnoh Silver medal became achievable for the first time.

Regular (6) =

Shiny (2)=

November
Spinda pattern 7 was released along with the change of Field Research. Nincada family was released in Field Research and Research Breakthrough. Shiny Caterpie was released. Shiny Pinsir was released on Pokémon GO Safari Zone Tainan.

Regular (4) =

Shiny (4)=

November
Shiny Gengar was released at the start of Special Raid Challenge. Shiny Gastly was available in wild after the event.

Shiny (3) =

November
Shiny Ponyta, Cubone and Alolan Marowak were released at the start of Ingress Prime Celebration.

Shiny (5)=

November
Budew and Buizel were released, including shiny form of Budew.

Regular (3) =

Shiny (1)=

November
Shiny Cyndaquil was released at the start of the eleventh Community Day.

Shiny (3)=

November
Cross-generation release of Sinnoh-region at the start of Hatchathon 2018. Shiny Elekid was released.

Regular (11)=

Shiny (8)=

November
Meltan was released world-wide along with the release of Pokémon Let's Go Pikachu and Let's Go Eevee. It should be noted that some Trainers were able to acquire Meltan on November when the first wave of cross-generation Pokémon became available. Shiny Magnemite was released in Let's Go Celebration.

Regular (2) =

Shiny (2)=

November
Cresselia was released as a Raid Boss.

Regular (1) =

November
Shiny Alolan Raichu was released at the start of Let's Go Celebration.

Shiny (1)=

December
Spinda pattern 6 was released along with the change of Field Research. Shiny Misdreavus was released.

Regular (1) =

Shiny (2)=

December
Shiny Sandshrew was released at the start of Tottori Festival.

Shiny (2)=

December
Heatran was released as a Raid Boss. Several Sinnoh-region Pokémon were released at the start of Holiday 2018. Shiny Delibird and Azurill were released.

Regular (14)=

Shiny (4)=

December
Deoxys Attack Forme was released as a Raid Boss in EX Raid Battles.

Regular (1) =