Gastly

Gastly is a Ghost, Poison-type Pokémon from the Kanto region. It evolves into Haunter when fed 25 candies and its final evolution is Gengar.

Attack availability

 * Astonish, Night Shade:  added  on February, 2017
 * Sucker Punch, Ominous Wind:  removed  on February, 2017

Photobombs
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Trivia

 * Gastly is one of the Pokémon that Ditto can appear as in wild.
 * 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, 2018 after several complaints from the community.