Weak toGrassElectric ×1.6

Attacker	Type	Moveset	DPS
Regieleki	Electric	Lock OnThunder CageLegacy	69.0
Zeraora	Electric	Volt SwitchPlasma Fists	59.2
Kartana	GrassSteel	Razor LeafLeaf Blade	59.0
Zekrom	DragonElectric	Charge BeamFusion BoltLegacy	57.9
Xurkitree	Electric	Thunder ShockDischarge	57.2
Roserade	GrassPoison	Magical LeafLeaf Storm	50.3
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	50.1
Deoxys	Psychic	Charge BeamThunderbolt	49.8
Electivire	Electric	Thunder ShockWild Charge	49.5
Zarude	DarkGrass	Vine WhipPower Whip	49.3
Rillaboom	Grass	Razor LeafFrenzy PlantLegacy	48.8
Raikou	Electric	Volt SwitchWild Charge	48.2

Rainy boosts the Electric attacks above. Rainy boosts Magikarp.

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

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

Questions people ask

What is Magikarp weak to in Pokémon GO?

Magikarp takes 1.6 times from Grass and Electric.

What's the best counter to Magikarp?

Regieleki with Lock On and Thunder Cage, worth 69.0 damage per second against Magikarp's own defense. The full ranking is above.