Weak toBugGhostGrassElectricDark ×1.6

Attacker	Type	Moveset	DPS
Regieleki	Electric	Lock OnThunder CageLegacy	61.0
Kartana	GrassSteel	Fury CutterLeaf Blade	52.7
Zeraora	Electric	Volt SwitchPlasma Fists	52.4
Blacephalon	FireGhost	AstonishShadow Ball	52.0
Zekrom	DragonElectric	Charge BeamFusion BoltLegacy	51.2
Xurkitree	Electric	Thunder ShockDischarge	50.6
Pheromosa	BugFighting	Bug BiteBug Buzz	50.1
Darkrai	Dark	SnarlShadow Ball	46.8
Chandelure	GhostFire	HexShadow Ball	46.4
Gengar	GhostPoison	LickShadow BallLegacy	46.4
Absol	Dark	SnarlBrutal SwingLegacy	45.4
Roserade	GrassPoison	Magical LeafLeaf Storm	44.5

Rainy boosts the Electric attacks above. Rainy and Windy boost Slowpoke.

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

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

Questions people ask

What is Slowpoke weak to in Pokémon GO?

Slowpoke takes 1.6 times from Bug, Ghost, Grass, Electric and Dark.

What's the best counter to Slowpoke?

Regieleki with Lock On and Thunder Cage, worth 61.0 damage per second against Slowpoke's own defense. The full ranking is above.