Weak toPoison ×2.56FlyingSteelFireIce ×1.6

Attacker	Type	Moveset	DPS
Eternatus	PoisonDragon	Poison JabSludge Bomb	46.0
Naganadel	PoisonDragon	Poison JabSludge Bomb	43.6
Nihilego	RockPoison	Poison JabSludge Bomb	41.4
Roserade	GrassPoison	Poison JabSludge Bomb	40.5
Munkidori	PoisonPsychic	Poison JabSludge Bomb	39.7
Revavroom	SteelPoison	Poison JabGunk Shot	38.2
Blacephalon	FireGhost	IncinerateMind BlownLegacy	38.1
Overqwil	DarkPoison	Poison JabSludge Bomb	37.2
Okidogi	PoisonFighting	Poison JabSludge Bomb	36.9
Toxicroak	PoisonFighting	Poison JabSludge Bomb	35.5
Salazzle	PoisonFire	Poison JabSludge Wave	34.5
Scolipede	BugPoison	Poison JabSludge Bomb	34.2

Overcast boosts the Poison attacks above. Clear and Overcast boost Whimsicott.

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

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

Questions people ask

What is Whimsicott weak to in Pokémon GO?

Whimsicott takes 2.56 times damage from Poison, and 1.6 times from Flying, Steel, Fire and Ice.

What's the best counter to Whimsicott?

Eternatus with Poison Jab and Sludge Bomb, worth 46.0 damage per second against Whimsicott's own defense. The full ranking is above.