Weak toWaterGrassIce ×1.6

Attacker	Type	Moveset	DPS
Kartana	GrassSteel	Razor LeafLeaf Blade	24.3
Inteleon	Water	Water GunHydro CannonLegacy	21.9
Kyogre	Water	WaterfallOrigin PulseLegacy	21.8
Roserade	GrassPoison	Magical LeafLeaf Storm	20.7
Kingler	Water	BubbleCrabhammer	20.7
Greninja	WaterDark	Water ShurikenHydro CannonLegacy	20.6
Zarude	DarkGrass	Vine WhipPower Whip	20.3
Eternatus	PoisonDragon	Dragon TailDynamax CannonLegacy	20.1
Rillaboom	Grass	Razor LeafFrenzy PlantLegacy	20.1
Quaquaval	WaterFighting	Water GunHydro CannonLegacy	19.8
Breloom	GrassFighting	Force PalmGrass KnotLegacy	19.7
Chien-Pao	DarkIce	Powder SnowAvalanche	19.6

Rainy boosts the Water attacks above. Clear boosts Groudon.

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

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

Questions people ask

What is Groudon weak to in Pokémon GO?

Groudon takes 1.6 times from Water, Grass and Ice.

What's the best counter to Groudon?

Kartana with Razor Leaf and Leaf Blade, worth 24.3 damage per second against Groudon's own defense. The full ranking is above.