Weak toBugGhostDark ×1.6

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	AstonishShadow Ball	55.4
Pheromosa	BugFighting	Bug BiteBug Buzz	53.4
Darkrai	Dark	SnarlShadow Ball	49.9
Chandelure	GhostFire	HexShadow Ball	49.5
Gengar	GhostPoison	LickShadow BallLegacy	49.4
Absol	Dark	SnarlBrutal SwingLegacy	48.4
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	47.3
Dragapult	DragonGhost	AstonishShadow Ball	47.2
Hoopa	PsychicGhost	AstonishShadow Ball	46.3
Lunala	PsychicGhost	Shadow ClawShadow Ball	46.3
Gholdengo	SteelGhost	HexShadow Ball	46.2
Zoroark	Dark	SnarlFoul Play	46.1

Fog boosts the Ghost attacks above. Windy boosts Unown.

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

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

Questions people ask

What is Unown weak to in Pokémon GO?

Unown takes 1.6 times from Bug, Ghost and Dark.

What's the best counter to Unown?

Blacephalon with Astonish and Shadow Ball, worth 55.4 damage per second against Unown's own defense. The full ranking is above.