Weak toFlyingPsychicFairy ×1.6

Attacker	Type	Moveset	DPS
Mewtwo	Psychic	ConfusionPsystrikeLegacy	32.8
Enamorus	FairyFlying	Fairy WindFly	31.7
Tapu Lele	PsychicFairy	ConfusionNatures MadnessLegacy	29.6
Yveltal	DarkFlying	GustOblivion WingLegacy	28.1
Alakazam	Psychic	ConfusionPsychicLegacy	28.0
Toucannon	NormalFlying	PeckBeak BlastLegacy	27.8
Moltres	FireFlying	Wing AttackFly	27.7
Staraptor	NormalFlying	GustFlyLegacy	27.3
Azelf	Psychic	ConfusionFuturesight	27.2
Hoopa	PsychicGhost	ConfusionPsychic	27.0
Espeon	Psychic	ConfusionPsychic	27.0
Regigigas	Normal	Zen HeadbuttCrush GripLegacy	27.0

Windy boosts the Psychic attacks above. Overcast boosts Sirfetch'd.

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

Sirfetch'd's moveset, CP and shiny All counters Raid board

Questions people ask

What is Sirfetch'd weak to in Pokémon GO?

Sirfetch'd takes 1.6 times from Flying, Psychic and Fairy.

What's the best counter to Sirfetch'd?

Mewtwo with Confusion and Psystrike, worth 32.8 damage per second against Sirfetch'd's own defense. The full ranking is above.