- Astonish, Night Shade: added on February 16th, 2017
- Sucker Punch, Ominous Wind: removed on February 16th, 2017
Gastly is part of a three-member family.
- Gastly was released with the game launch on July 6th, 2016.
- Shiny form of Gastly was released after Gengar Special Raid Challenge on November 3rd, 2018.
|In wild since 2016 Jul 6
Increased spawns in:
Increased chance/Previously in:
Make 3 Great Throws: 2018 Apr - 2021 May
Trade a Pokémon: 2021 Feb
Transfer 5 Pokémon: Catch Mastery: Ghost
Catch 3 Gastly: July 2020 Community Day
Send 2 Gifts to friends: 2019 Jan - Apr
Make a Nice Curveball Throw: 2018 Jul
Special Research/Timed Research:
Ultra Unlock 2021: Space - 3rd part: Catch 10 Pokemon
Mega Gengar - 1st part: Catch 13 Ghost-type Pokémon, 2nd part: Make 9 Nice Throws in a row
The Great Gastly - 1st part: Make 5 Nice Throws & Completing 1st part
Throwback Challenge 2020: Kanto - 4th part: Give your buddy a treat
|1,054||Obtainable during: |
July 2020 Community Day: Jul 19
- During Halloween 2017, there were shiny forms of Gastly family members added to game data, although they were not released to be caught in gameplay. 
- Shiny sprite of Gastly was updated on November 6th, 2018 after several complaints from the community.
- page, on the official Pokédex website
- article, on the Bulbapedia
- Gastly article, on the Pokémon Wiki