Weak toFlyingPoisonBugFireIce ×1.6

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	IncinerateMind BlownLegacy	49.2
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	42.0
Reshiram	DragonFire	Fire FangFusion FlareLegacy	40.8
Pheromosa	BugFighting	Bug BiteBug Buzz	38.3
Salamence	DragonFlying	Fire FangFly	37.6
Chandelure	GhostFire	Fire SpinOverheat	37.4
Moltres	FireFlying	Fire SpinFly	37.0
Cinderace	Fire	Fire SpinPyroball	36.9
Enamorus	FairyFlying	Fairy WindFly	36.7
Volcarona	BugFire	Fire SpinOverheat	36.5
Darmanitan	Fire	Fire FangOverheat	36.3
Yveltal	DarkFlying	GustOblivion WingLegacy	36.2

Clear boosts the Fire attacks above. Clear boosts Simisage.

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

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

Questions people ask

What is Simisage weak to in Pokémon GO?

Simisage takes 1.6 times from Flying, Poison, Bug, Fire and Ice.

What's the best counter to Simisage?

Blacephalon with Incinerate and Mind Blown, worth 49.2 damage per second against Simisage's own defense. The full ranking is above.