Mega Gengar is a dual Ghost and Poison-type Pokémon that can be a challenging opponent in Pokémon GO raids. To defeat Mega Gengar, players should use Pokémon with strong Dark, Ghost, Ground, and Psychic-type moves. Some of the best counters include:
- Primal Groudon
- Shadow Mewtwo
- Mega Latios
- Mewtwo
- Mega Tyranitar
- Shadow Tyranitar
- Mega Houndoom
- Darkrai
- Metagross
- Giratina-Origin
- Chandelure
- Shadow Ball Mewtwo
- Calyrex (Shadow Rider)
- Deoxys (Attack)
- Hoopa (Unbound)
Mega Gengar is also its own best counter, but it should only be used if the raid boss has Focus Blast or Sludge Bomb, since one Shadow Ball would easily KO, even from full health. One advantage of using Mega Gengar is that it boosts the power of your allies’ Ghost type moves by 40% while it’s in battle, which makes it a fantastic partner for other strong Ghost type attackers such as Chandelure, Giratina-Origin, non-Mega Gengar, and Shadow Ball Mewtwo. Ground types can also duo Mega Gengar against Sludge Bomb, but Sunny weather is required.