Weak toFlyingRockFire ×1.6

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	IncinerateMind BlownLegacy	46.9
Reshiram	DragonFire	Fire FangFusion FlareLegacy	39.0
Salamence	DragonFlying	Fire FangFly	36.0
Chandelure	GhostFire	Fire SpinOverheat	35.7
Moltres	FireFlying	Fire SpinFly	35.4
Cinderace	Fire	Fire SpinPyroball	35.2
Enamorus	FairyFlying	Fairy WindFly	35.0
Volcarona	BugFire	Fire SpinOverheat	34.8
Darmanitan	Fire	Fire FangOverheat	34.7
Yveltal	DarkFlying	GustOblivion WingLegacy	34.6
Toucannon	NormalFlying	PeckBeak BlastLegacy	34.2
Glimmora	RockPoison	Rock ThrowMeteor Beam	33.7

Clear boosts the Fire attacks above. Rainy boosts Shelmet.

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

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

Questions people ask

What is Shelmet weak to in Pokémon GO?

Shelmet takes 1.6 times from Flying, Rock and Fire.

What's the best counter to Shelmet?

Blacephalon with Incinerate and Mind Blown, worth 46.9 damage per second against Shelmet's own defense. The full ranking is above.