Weak toGrassElectric ×1.6

Attacker	Type	Moveset	DPS
Regieleki	Electric	Lock OnThunder CageLegacy	118.9
Zeraora	Electric	Volt SwitchPlasma Fists	102.1
Kartana	GrassSteel	Razor LeafLeaf Blade	101.8
Zekrom	DragonElectric	Charge BeamFusion BoltLegacy	99.8
Xurkitree	Electric	Thunder ShockDischarge	98.6
Roserade	GrassPoison	Magical LeafLeaf Storm	86.7
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	86.4
Deoxys	Psychic	Charge BeamThunderbolt	85.9
Electivire	Electric	Thunder ShockWild Charge	85.3
Zarude	DarkGrass	Vine WhipPower Whip	85.1
Rillaboom	Grass	Razor LeafFrenzy PlantLegacy	84.1
Raikou	Electric	Volt SwitchWild Charge	83.0

Rainy boosts the Electric attacks above. Rainy boosts Wishiwashi.

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

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

Questions people ask

What is Wishiwashi weak to in Pokémon GO?

Wishiwashi takes 1.6 times from Grass and Electric.

What's the best counter to Wishiwashi?

Regieleki with Lock On and Thunder Cage, worth 118.9 damage per second against Wishiwashi's own defense. The full ranking is above.