Halloween 2017

Halloween in 2017 is the second Halloween event in Pokémon GO.

Featured Pokémon
The following Pokémon would be released with the start of the event:

Selected Halloween-themed Pokémon would have increased spawn rates in the wild.

These Shiny Pokémon would be released with the start of the event: PS Sableye (302) PS Shuppet (353) PS Banette (354) PS Duskull (355) PS Dusclops (356)

2-km Pokémon Eggs obtained during the event would hatch more of these Pokémon:

Avatar items
These avatar items would be released with the beginning of the event:

Shop special offer
Special boxes, featuring items such as Raid Passes and Super Incubators, were available from the in-game shop.

The following offers were available from the shop from the start of the event.

Promotional pictures
Following promotional pictures were published by creators of the game across their social media channels.

Trivia

 * During the Halloween event of 2017, there were several Shiny Pokémon released in parts:
 * On October, 2017 - Shiny Sableye began appearing on the first day of the Halloween event of 2017.
 * On October, 2017 - Shiny Duskull and Dusclops began appearing on the seventh day of the event.
 * On October, 2017 - Shiny Shuppet and Banette began appearing on the twelfth day of the event.
 * During this event, there were shiny forms of Gastly family members added to game data, although they weren't released to be caught in gameplay.
 * Shiny variants of family members of both Gastly and Misdreavus families were highly anticipated by players to appear during Halloween event in 2017 and later 2018, however neither of these Pokémon's shiny form were released then.
 * However, shiny variants of Gastly and its evolved forms were released on Gengar Day, and shiny forms of Misdreavus and Mismagius got released on December, 2018 with new Field Research for that month.