Weak toBugGhostDark ×1.6

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	AstonishShadow Ball	51.1
Pheromosa	BugFighting	Bug BiteBug Buzz	49.3
Darkrai	Dark	SnarlShadow Ball	46.0
Chandelure	GhostFire	HexShadow Ball	45.6
Gengar	GhostPoison	LickShadow BallLegacy	45.5
Absol	Dark	SnarlBrutal SwingLegacy	44.6
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	43.6
Dragapult	DragonGhost	AstonishShadow Ball	43.5
Hoopa	PsychicGhost	AstonishShadow Ball	42.7
Lunala	PsychicGhost	Shadow ClawShadow Ball	42.6
Gholdengo	SteelGhost	HexShadow Ball	42.6
Zoroark	Dark	SnarlFoul Play	42.5

Fog boosts the Ghost attacks above. Windy boosts Elgyem.

Level 40, 15 attack IV, costed against Elgyem's own defense and typing, one per evolution family.

Elgyem's moveset, CP and shiny All counters Raid board

Questions people ask

What is Elgyem weak to in Pokémon GO?

Elgyem takes 1.6 times from Bug, Ghost and Dark.

What's the best counter to Elgyem?

Blacephalon with Astonish and Shadow Ball, worth 51.1 damage per second against Elgyem's own defense. The full ranking is above.