Weak toGroundWaterPsychicIce ×1.6

Attacker	Type	Moveset	DPS
Mewtwo	Psychic	ConfusionPsystrikeLegacy	36.6
Alakazam	Psychic	ConfusionPsychicLegacy	31.3
Inteleon	Water	Water GunHydro CannonLegacy	31.1
Kyogre	Water	WaterfallOrigin PulseLegacy	31.0
Groudon	Ground	Mud ShotPrecipice BladesLegacy	30.4
Azelf	Psychic	ConfusionFuturesight	30.4
Hoopa	PsychicGhost	ConfusionPsychic	30.2
Espeon	Psychic	ConfusionPsychic	30.2
Regigigas	Normal	Zen HeadbuttCrush GripLegacy	30.1
Lunala	PsychicGhost	ConfusionPsychic	29.5
Kingler	Water	BubbleCrabhammer	29.4
Greninja	WaterDark	Water ShurikenHydro CannonLegacy	29.3

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

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

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

Questions people ask

What is Nidoking weak to in Pokémon GO?

Nidoking takes 1.6 times from Ground, Water, Psychic and Ice.

What's the best counter to Nidoking?

Mewtwo with Confusion and Psystrike, worth 36.6 damage per second against Nidoking's own defense. The full ranking is above.