Gengar

Gengar is a Ghost, Poison-type Pokémon from the Kanto region. It evolves from Haunter after being fed 100 candies or with no candy cost if traded. Gengar it is final evolution of Gastly.

Trivia

 * Normally, evolved stages of Pokémon cannot be shiny in encounter screen, but exceptionally during Special Raid Challenge, Gengar could.
 * Its was a tier Raid Boss and has Raid CP of 31,256 during the Special Raid Challenge.
 * On August, 2016, Sludge Wave was replaced with Sludge Bomb.
 * During the Halloween event in 2017, there were shiny forms of Gastly family members added to game data, although they weren't released to be caught in gameplay.