Weak toGhostDark ×1.6

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	AstonishShadow Ball	28.0
Darkrai	Dark	SnarlShadow Ball	25.2
Chandelure	GhostFire	HexShadow Ball	25.0
Gengar	GhostPoison	LickShadow BallLegacy	24.9
Absol	Dark	SnarlBrutal SwingLegacy	24.4
Dragapult	DragonGhost	AstonishShadow Ball	23.8
Hoopa	PsychicGhost	AstonishShadow Ball	23.4
Lunala	PsychicGhost	Shadow ClawShadow Ball	23.4
Eternatus	PoisonDragon	Dragon TailDynamax CannonLegacy	23.3
Gholdengo	SteelGhost	HexShadow Ball	23.3
Zoroark	Dark	SnarlFoul Play	23.3
Chi-Yu	DarkFire	SnarlDark Pulse	23.2

Fog boosts the Ghost attacks above. Fog boosts Houndstone.

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

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

Questions people ask

What is Houndstone weak to in Pokémon GO?

Houndstone takes 1.6 times from Ghost and Dark.

What's the best counter to Houndstone?

Blacephalon with Astonish and Shadow Ball, worth 28.0 damage per second against Houndstone's own defense. The full ranking is above.