Weak toBugGhostDark ×1.6

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	AstonishShadow Ball	59.9
Pheromosa	BugFighting	Bug BiteBug Buzz	57.8
Darkrai	Dark	SnarlShadow Ball	53.9
Chandelure	GhostFire	HexShadow Ball	53.5
Gengar	GhostPoison	LickShadow BallLegacy	53.4
Absol	Dark	SnarlBrutal SwingLegacy	52.4
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	51.1
Dragapult	DragonGhost	AstonishShadow Ball	51.0
Hoopa	PsychicGhost	AstonishShadow Ball	50.1
Lunala	PsychicGhost	Shadow ClawShadow Ball	50.0
Gholdengo	SteelGhost	HexShadow Ball	50.0
Zoroark	Dark	SnarlFoul Play	49.9

Fog boosts the Ghost attacks above. Windy boosts Solosis.

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

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

Questions people ask

What is Solosis weak to in Pokémon GO?

Solosis takes 1.6 times from Bug, Ghost and Dark.

What's the best counter to Solosis?

Blacephalon with Astonish and Shadow Ball, worth 59.9 damage per second against Solosis's own defense. The full ranking is above.