Weak toBugGhostDark ×1.6

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	AstonishShadow Ball	38.9
Pheromosa	BugFighting	Bug BiteBug Buzz	37.5
Darkrai	Dark	SnarlShadow Ball	35.0
Chandelure	GhostFire	HexShadow Ball	34.7
Gengar	GhostPoison	LickShadow BallLegacy	34.7
Absol	Dark	SnarlBrutal SwingLegacy	34.0
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	33.2
Dragapult	DragonGhost	AstonishShadow Ball	33.1
Hoopa	PsychicGhost	AstonishShadow Ball	32.5
Lunala	PsychicGhost	Shadow ClawShadow Ball	32.5
Gholdengo	SteelGhost	HexShadow Ball	32.4
Zoroark	Dark	SnarlFoul Play	32.4

Fog boosts the Ghost attacks above. Windy boosts Drowzee.

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

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

Questions people ask

What is Drowzee weak to in Pokémon GO?

Drowzee takes 1.6 times from Bug, Ghost and Dark.

What's the best counter to Drowzee?

Blacephalon with Astonish and Shadow Ball, worth 38.9 damage per second against Drowzee's own defense. The full ranking is above.