Weak toPoisonSteel ×1.6

Attacker	Type	Moveset	DPS
Eternatus	PoisonDragon	Poison JabSludge Bomb	38.9
Metagross	SteelPsychic	Bullet PunchMeteor MashLegacy	38.2
Tinkaton	FairySteel	Fairy WindGigaton HammerLegacy	37.2
Naganadel	PoisonDragon	Poison JabSludge Bomb	36.9
Lucario	FightingSteel	Bullet PunchMeteor Mash	35.3
Nihilego	RockPoison	Poison JabSludge Bomb	35.1
Roserade	GrassPoison	Poison JabSludge Bomb	34.3
Dialga	SteelDragon	Metal ClawIron Head	33.9
Munkidori	PoisonPsychic	Poison JabSludge Bomb	33.6
Regigigas	Normal	Hidden PowerCrush GripLegacy	33.2
Genesect	BugSteel	Metal ClawMagnet Bomb	33.1
Revavroom	SteelPoison	Poison JabGunk Shot	32.3

Snow boosts the Steel attacks above. Overcast boosts Fidough.

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

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

Questions people ask

What is Fidough weak to in Pokémon GO?

Fidough takes 1.6 times from Poison and Steel.

What's the best counter to Fidough?

Eternatus with Poison Jab and Sludge Bomb, worth 38.9 damage per second against Fidough's own defense. The full ranking is above.