List of Pokémon forms by release date/2017

By the start of 2017, the number of released forms was:

By the end of 2017, the number of released forms was:

In 2017, 170 new Pokémon species, 195 distinct regular forms and 14 shiny forms were made available to be obtained. The following medals became achievable for the first time:
 * Johto Silver Johto Silver.png and Gold Johto Gold.png.
 * Hoenn Bronze Hoenn Bronze.png and Silver Hoenn Silver.png.

The total number of Pokémon species and Pokémon distinct forms (regular and shiny) was updated according to the following events in 2017:

February
Main release of Johto-region. 84 Pokémon species including 26 forms of Unown were released, one for each letter of the alphabet. Johto Silver and Gold  medals became achievable for the first time.

Regular (109) =

March
First shiny Pokémon Magikarp was released on Water Festival 2017.

Shiny (2) =

July
Articuno and Lugia were released as Raid Bosses.

Regular (2) =

July
Moltres was released as a Raid Boss.

Regular (1) =

August
Zapdos was released as a Raid Boss.

Regular (1) =

August
Shiny Pikachu family was released on Pokémon GO Park.

Shiny (3) =

August
Mewtwo was released as a Raid Boss.

Regular (1) =

August
Raikou, Entei and Suicune were released as Raid Bosses. They were exclusive to following regions in the first month: Raikou could be battled throughout the Americas. Entei could be battled throughout Europe and Africa. Suicune could be battled throughout the Asia-Pacific region.

Regular (3) =

October
Release of Hoenn-region Halloween-themed Pokémon on Halloween 2017. Shiny Sableye was released. Hoenn-region Pokédex introduced 135 new Pokémon species, 148 distinct regular forms and 145 distinct shiny forms. Hoenn Bronze medal became achievable for the first time.

Regular (5) =

Shiny (1) =

October
Shiny form of Duskull was released on the sixth day of Halloween 2017.

Shiny (2) =

October
Shiny form of Shuppet was released on the eleventh day of Halloween 2017.

Shiny (2) =

November
Ho-Oh was released as a Raid Boss.

Regular (1) =

December
Main release of Hoenn-region. Shiny Absol and Mawile were released. Johto Silver medal became achievable for the first time.

Regular (50) =

Shiny (2)=

December
Groudon was released as a Raid Boss.

Regular (1) =

December
Release of Hoenn-region Aquatic-themed Pokémon on Holiday 2017. Delibird and shiny Snorunt were released.

Regular (21) =

Shiny (2)=