Weak toFlyingPoisonBugFireIce ×1.6

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	IncinerateMind BlownLegacy	92.1
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	78.7
Reshiram	DragonFire	Fire FangFusion FlareLegacy	76.5
Pheromosa	BugFighting	Bug BiteBug Buzz	71.7
Salamence	DragonFlying	Fire FangFly	70.5
Chandelure	GhostFire	Fire SpinOverheat	70.0
Moltres	FireFlying	Fire SpinFly	69.4
Cinderace	Fire	Fire SpinPyroball	69.0
Enamorus	FairyFlying	Fairy WindFly	68.7
Volcarona	BugFire	Fire SpinOverheat	68.3
Darmanitan	Fire	Fire FangOverheat	68.1
Yveltal	DarkFlying	GustOblivion WingLegacy	67.9

Clear boosts the Fire attacks above. Clear boosts Fomantis.

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

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

Questions people ask

What is Fomantis weak to in Pokémon GO?

Fomantis takes 1.6 times from Flying, Poison, Bug, Fire and Ice.

What's the best counter to Fomantis?

Blacephalon with Incinerate and Mind Blown, worth 92.1 damage per second against Fomantis's own defense. The full ranking is above.