Mega Gengar Counters and Movesets : r/pokemongo

Pokémon Go' Gengar Day Announced, Shiny Gengar Chance in Raid Battles

Pokemon Card - #94 Mega Gengar Shiny by Nova-Nebulas on DeviantArt

This makes up for no shiny gengar after 30 raids : r/pokemongo

Pokemon GO Mega Gengar Counters and Weaknesses, Mega Raid Guide

Pokémon GO: Mega Gengar Raid Guide (Best Counters & Weaknesses)

Mega Gengar in Pokémon GO: best counters, attacks and Pokémon to defeat it - Meristation

Pokémon Go' Mega Evolution Event 3: Start Time, Mega Gengar

How to get Shiny Darkrai, Shiny Gengar, and Shiny Banette in Pokémon GO

Pokemon 26094 Shiny Giga Gengar Pokedex: Evolution, Moves

Bzzt! Shiny Helioptile and Shiny Tapu Koko bring the thunder in the Crackling Voltage event; Team GO Rocket activity also detected – Pokémon GO