Weak toFightingGroundRockWater ×1.6

Attacker	Type	Moveset	DPS
Lucario	FightingSteel	Force PalmAura SphereLegacy	38.8
Pheromosa	BugFighting	Low KickFocus Blast	35.5
Terrakion	RockFighting	Double KickSacred SwordLegacy	35.4
Blaziken	FireFighting	CounterAura Sphere	35.1
Kartana	GrassSteel	Fury CutterSacred Sword	33.5
Inteleon	Water	Water GunHydro CannonLegacy	33.5
Kyogre	Water	WaterfallOrigin PulseLegacy	33.3
Glimmora	RockPoison	Rock ThrowMeteor Beam	32.9
Groudon	Ground	Mud ShotPrecipice BladesLegacy	32.7
Rampardos	Rock	Smack DownRock Slide	32.6
Conkeldurr	Fighting	Force PalmFocus Blast	32.4
Keldeo	WaterFighting	Low KickSacred Sword	32.0

Overcast boosts the Fighting attacks above. Clear and Fog boost Houndoom.

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

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

Questions people ask

What is Houndoom weak to in Pokémon GO?

Houndoom takes 1.6 times from Fighting, Ground, Rock and Water.

What's the best counter to Houndoom?

Lucario with Force Palm and Aura Sphere, worth 38.8 damage per second against Houndoom's own defense. The full ranking is above.