Weak toFightingGroundFire ×1.6

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	IncinerateMind BlownLegacy	51.6
Lucario	FightingSteel	Force PalmAura SphereLegacy	43.8
Reshiram	DragonFire	Fire FangFusion FlareLegacy	42.8
Pheromosa	BugFighting	Low KickFocus Blast	40.1
Terrakion	RockFighting	Double KickSacred SwordLegacy	39.9
Blaziken	FireFighting	CounterAura Sphere	39.6
Chandelure	GhostFire	Fire SpinOverheat	39.2
Cinderace	Fire	Fire SpinPyroball	38.7
Volcarona	BugFire	Fire SpinOverheat	38.3
Darmanitan	Fire	Fire FangOverheat	38.1
Groudon	Ground	Mud ShotPrecipice BladesLegacy	36.8
Moltres	FireFlying	Fire SpinOverheat	36.5

Overcast boosts the Fighting attacks above. Snow boosts Copperajah.

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

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

Questions people ask

What is Copperajah weak to in Pokémon GO?

Copperajah takes 1.6 times from Fighting, Ground and Fire.

What's the best counter to Copperajah?

Blacephalon with Incinerate and Mind Blown, worth 51.6 damage per second against Copperajah's own defense. The full ranking is above.