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 16th
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 24th
First shiny Pokémon Magikarp were released in Water Festival 2017.

Shiny (2) =

July 22nd
Articuno and Lugia were released as the Legendary Raid Bosses for the first time which were available to catch only after defeating it.

Regular (2) =

July 31st
Moltres was available from Raid Battles for the first time.

Regular (1) =

August 7th
Zapdos was available from Raid Battles for the first time.

Regular (1) =

August 9th
Shiny Pikachu family was released since Pokémon GO Park.

Shiny (3) =

August 14th
Mewtwo was confirmed as a Raid Boss.

Regular (1) =

August 31st
Legendary Beasts were available as the Legendary Raid Bosses for the first time. 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 20th
Halloween 2017 event indicated the first Hoenn Pokémon release with only shiny form of Sableye was released at the start. 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 26th
Shiny form of Duskull was released.

Shiny (2) =

October 31st
Shiny form of Shuppet was released.

Shiny (2) =

November 27th
Ho-Oh was released as the Legendary Raid Boss for the first time and were available to catch only after defeating it.

Regular (1) =

December 8th
Main release of Hoenn-region. Johto Silver medal became achievable for the first time.

Regular (50) = Shiny (2)=

December 15th
Groudon was available to defeated and caught in Raid Battles for the first time.

Regular (1) =

December 21st
Holiday 2017 event brought Delibird and the aquatic-themed Hoenn-region Pokémon.

Regular (21) = Shiny (2)=