Weak toGrassElectric ×1.6

Attacker	Type	Moveset	DPS
Regieleki	Electric	Lock OnThunder CageLegacy	39.0
Zeraora	Electric	Volt SwitchPlasma Fists	33.5
Kartana	GrassSteel	Razor LeafLeaf Blade	33.4
Zekrom	DragonElectric	Charge BeamFusion BoltLegacy	32.7
Xurkitree	Electric	Thunder ShockDischarge	32.3
Roserade	GrassPoison	Magical LeafLeaf Storm	28.4
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	28.3
Deoxys	Psychic	Charge BeamThunderbolt	28.1
Electivire	Electric	Thunder ShockWild Charge	28.0
Zarude	DarkGrass	Vine WhipPower Whip	27.9
Rillaboom	Grass	Razor LeafFrenzy PlantLegacy	27.6
Raikou	Electric	Volt SwitchWild Charge	27.2

Rainy boosts the Electric attacks above. Rainy boosts Golduck.

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

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

Questions people ask

What is Golduck weak to in Pokémon GO?

Golduck takes 1.6 times from Grass and Electric.

What's the best counter to Golduck?

Regieleki with Lock On and Thunder Cage, worth 39.0 damage per second against Golduck's own defense. The full ranking is above.