Weak toFlyingRockFire ×1.6

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	IncinerateMind BlownLegacy	79.1
Reshiram	DragonFire	Fire FangFusion FlareLegacy	65.7
Salamence	DragonFlying	Fire FangFly	60.6
Chandelure	GhostFire	Fire SpinOverheat	60.1
Moltres	FireFlying	Fire SpinFly	59.6
Cinderace	Fire	Fire SpinPyroball	59.3
Enamorus	FairyFlying	Fairy WindFly	59.0
Volcarona	BugFire	Fire SpinOverheat	58.6
Darmanitan	Fire	Fire FangOverheat	58.4
Yveltal	DarkFlying	GustOblivion WingLegacy	58.3
Toucannon	NormalFlying	PeckBeak BlastLegacy	57.7
Glimmora	RockPoison	Rock ThrowMeteor Beam	56.8

Clear boosts the Fire attacks above. Rainy boosts Cascoon.

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

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

Questions people ask

What is Cascoon weak to in Pokémon GO?

Cascoon takes 1.6 times from Flying, Rock and Fire.

What's the best counter to Cascoon?

Blacephalon with Incinerate and Mind Blown, worth 79.1 damage per second against Cascoon's own defense. The full ranking is above.