Weak toGrassElectric ×1.6

Attacker	Type	Moveset	DPS
Regieleki	Electric	Lock OnThunder CageLegacy	60.5
Zeraora	Electric	Volt SwitchPlasma Fists	52.0
Kartana	GrassSteel	Razor LeafLeaf Blade	51.8
Zekrom	DragonElectric	Charge BeamFusion BoltLegacy	50.8
Xurkitree	Electric	Thunder ShockDischarge	50.2
Roserade	GrassPoison	Magical LeafLeaf Storm	44.1
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	44.0
Deoxys	Psychic	Charge BeamThunderbolt	43.7
Electivire	Electric	Thunder ShockWild Charge	43.4
Zarude	DarkGrass	Vine WhipPower Whip	43.3
Rillaboom	Grass	Razor LeafFrenzy PlantLegacy	42.8
Raikou	Electric	Volt SwitchWild Charge	42.2

Rainy boosts the Electric attacks above. Rainy boosts Corphish.

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

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

Questions people ask

What is Corphish weak to in Pokémon GO?

Corphish takes 1.6 times from Grass and Electric.

What's the best counter to Corphish?

Regieleki with Lock On and Thunder Cage, worth 60.5 damage per second against Corphish's own defense. The full ranking is above.