Weak toFlyingGroundWaterPsychic ×1.6

Attacker	Type	Moveset	DPS
Mewtwo	Psychic	ConfusionPsystrikeLegacy	48.2
Enamorus	FairyFlying	Fairy WindFly	41.7
Yveltal	DarkFlying	GustOblivion WingLegacy	41.2
Alakazam	Psychic	ConfusionPsychicLegacy	41.2
Inteleon	Water	Water GunHydro CannonLegacy	40.9
Toucannon	NormalFlying	PeckBeak BlastLegacy	40.8
Kyogre	Water	WaterfallOrigin PulseLegacy	40.8
Moltres	FireFlying	Wing AttackFly	40.6
Staraptor	NormalFlying	GustFlyLegacy	40.1
Groudon	Ground	Mud ShotPrecipice BladesLegacy	40.0
Azelf	Psychic	ConfusionFuturesight	39.9
Hoopa	PsychicGhost	ConfusionPsychic	39.7

Windy boosts the Psychic attacks above. Clear and Overcast boost Combusken.

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

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

Questions people ask

What is Combusken weak to in Pokémon GO?

Combusken takes 1.6 times from Flying, Ground, Water and Psychic.

What's the best counter to Combusken?

Mewtwo with Confusion and Psystrike, worth 48.2 damage per second against Combusken's own defense. The full ranking is above.