Weak toGhostDark ×1.6

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	AstonishShadow Ball	28.8
Darkrai	Dark	SnarlShadow Ball	25.9
Chandelure	GhostFire	HexShadow Ball	25.7
Gengar	GhostPoison	LickShadow BallLegacy	25.7
Absol	Dark	SnarlBrutal SwingLegacy	25.1
Dragapult	DragonGhost	AstonishShadow Ball	24.5
Hoopa	PsychicGhost	AstonishShadow Ball	24.1
Lunala	PsychicGhost	Shadow ClawShadow Ball	24.0
Eternatus	PoisonDragon	Dragon TailDynamax CannonLegacy	24.0
Gholdengo	SteelGhost	HexShadow Ball	24.0
Zoroark	Dark	SnarlFoul Play	24.0
Chi-Yu	DarkFire	SnarlDark Pulse	23.9

Fog boosts the Ghost attacks above. Fog boosts Polteageist.

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

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

Questions people ask

What is Polteageist weak to in Pokémon GO?

Polteageist takes 1.6 times from Ghost and Dark.

What's the best counter to Polteageist?

Blacephalon with Astonish and Shadow Ball, worth 28.8 damage per second against Polteageist's own defense. The full ranking is above.