Weak toFlyingPoisonBugFireIce ×1.6

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	IncinerateMind BlownLegacy	48.8
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	41.7
Reshiram	DragonFire	Fire FangFusion FlareLegacy	40.5
Pheromosa	BugFighting	Bug BiteBug Buzz	38.0
Salamence	DragonFlying	Fire FangFly	37.4
Chandelure	GhostFire	Fire SpinOverheat	37.1
Moltres	FireFlying	Fire SpinFly	36.8
Cinderace	Fire	Fire SpinPyroball	36.6
Enamorus	FairyFlying	Fairy WindFly	36.4
Volcarona	BugFire	Fire SpinOverheat	36.2
Darmanitan	Fire	Fire FangOverheat	36.1
Yveltal	DarkFlying	GustOblivion WingLegacy	36.0

Clear boosts the Fire attacks above. Clear boosts Thwackey.

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

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

Questions people ask

What is Thwackey weak to in Pokémon GO?

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

What's the best counter to Thwackey?

Blacephalon with Incinerate and Mind Blown, worth 48.8 damage per second against Thwackey's own defense. The full ranking is above.