Weak toGroundPsychic ×1.6

Attacker	Type	Moveset	DPS
Mewtwo	Psychic	ConfusionPsystrikeLegacy	38.2
Alakazam	Psychic	ConfusionPsychicLegacy	32.6
Groudon	Ground	Mud ShotPrecipice BladesLegacy	31.7
Azelf	Psychic	ConfusionFuturesight	31.6
Hoopa	PsychicGhost	ConfusionPsychic	31.5
Espeon	Psychic	ConfusionPsychic	31.5
Regigigas	Normal	Zen HeadbuttCrush GripLegacy	31.4
Lunala	PsychicGhost	ConfusionPsychic	30.8
Tapu Lele	PsychicFairy	ConfusionFuturesight	30.4
Latios	DragonPsychic	Zen HeadbuttPsychic	30.2
Excadrill	GroundSteel	Mud SlapEarthquake	30.1
Eternatus	PoisonDragon	Dragon TailDynamax CannonLegacy	29.9

Windy boosts the Psychic attacks above. Overcast and Partly cloudy boost Grafaiai.

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

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

Questions people ask

What is Grafaiai weak to in Pokémon GO?

Grafaiai takes 1.6 times from Ground and Psychic.

What's the best counter to Grafaiai?

Mewtwo with Confusion and Psystrike, worth 38.2 damage per second against Grafaiai's own defense. The full ranking is above.