Weak toGrass ×2.56

Attacker	Type	Moveset	DPS
Kartana	GrassSteel	Razor LeafLeaf Blade	60.6
Roserade	GrassPoison	Magical LeafLeaf Storm	51.6
Zarude	DarkGrass	Vine WhipPower Whip	50.6
Rillaboom	Grass	Razor LeafFrenzy PlantLegacy	50.0
Meowscarada	GrassDark	LeafageFrenzy PlantLegacy	48.8
Decidueye	GrassGhost	Magical LeafFrenzy PlantLegacy	48.1
Tapu Bulu	GrassFairy	Bullet SeedGrass Knot	47.9
Tsareena	Grass	Magical LeafGrass Knot	47.3
Sceptile	Grass	Bullet SeedFrenzy PlantLegacy	46.9
Ogerpon	Grass	Magical LeafGrass Knot	46.7
Breloom	GrassFighting	Bullet SeedGrass KnotLegacy	46.4
Xurkitree	Electric	Thunder ShockPower Whip	45.9

Clear boosts the Grass attacks above. Clear and Rainy boost Whiscash.

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

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

Questions people ask

What is Whiscash weak to in Pokémon GO?

Whiscash takes 2.56 times damage from Grass.

What's the best counter to Whiscash?

Kartana with Razor Leaf and Leaf Blade, worth 60.6 damage per second against Whiscash's own defense. The full ranking is above.