Weak toFlying ×2.56FirePsychicFairy ×1.6

Attacker	Type	Moveset	DPS
Enamorus	FairyFlying	Fairy WindFly	41.7
Yveltal	DarkFlying	GustOblivion WingLegacy	41.2
Toucannon	NormalFlying	PeckBeak BlastLegacy	40.8
Moltres	FireFlying	Wing AttackFly	40.6
Staraptor	NormalFlying	GustFlyLegacy	40.1
Rayquaza	DragonFlying	Air SlashHurricaneLegacy	37.5
Honchkrow	DarkFlying	PeckBrave Bird	36.5
Braviary	NormalFlying	Air SlashFly	36.5
Salamence	DragonFlying	Fire FangFly	36.4
Flamigo	FlyingFighting	Wing AttackBrave Bird	35.6
Tornadus	Flying	Air SlashHurricane	35.3
Blacephalon	FireGhost	IncinerateMind BlownLegacy	35.0

Windy boosts the Flying attacks above. Overcast and Rainy boost Slither Wing.

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

Slither Wing's moveset, CP and shiny All counters Raid board

Questions people ask

What is Slither Wing weak to in Pokémon GO?

Slither Wing takes 2.56 times damage from Flying, and 1.6 times from Fire, Psychic and Fairy.

What's the best counter to Slither Wing?

Enamorus with Fairy Wind and Fly, worth 41.7 damage per second against Slither Wing's own defense. The full ranking is above.