Weak toFightingGroundFire ×1.6

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	IncinerateMind BlownLegacy	29.8
Lucario	FightingSteel	Force PalmAura SphereLegacy	25.3
Reshiram	DragonFire	Fire FangFusion FlareLegacy	24.8
Pheromosa	BugFighting	Low KickFocus Blast	23.1
Terrakion	RockFighting	Double KickSacred SwordLegacy	23.1
Blaziken	FireFighting	CounterAura Sphere	22.9
Chandelure	GhostFire	Fire SpinOverheat	22.7
Cinderace	Fire	Fire SpinPyroball	22.4
Volcarona	BugFire	Fire SpinOverheat	22.1
Darmanitan	Fire	Fire FangOverheat	22.0
Groudon	Ground	Mud ShotPrecipice BladesLegacy	21.3
Moltres	FireFlying	Fire SpinOverheat	21.1

Overcast boosts the Fighting attacks above. Overcast and Snow boost Cobalion.

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

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

Questions people ask

What is Cobalion weak to in Pokémon GO?

Cobalion takes 1.6 times from Fighting, Ground and Fire.

What's the best counter to Cobalion?

Blacephalon with Incinerate and Mind Blown, worth 29.8 damage per second against Cobalion's own defense. The full ranking is above.