Weak toFightingGroundFire ×1.6

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	IncinerateMind BlownLegacy	45.8
Lucario	FightingSteel	Force PalmAura SphereLegacy	38.8
Reshiram	DragonFire	Fire FangFusion FlareLegacy	38.0
Pheromosa	BugFighting	Low KickFocus Blast	35.5
Terrakion	RockFighting	Double KickSacred SwordLegacy	35.4
Blaziken	FireFighting	CounterAura Sphere	35.1
Chandelure	GhostFire	Fire SpinOverheat	34.8
Cinderace	Fire	Fire SpinPyroball	34.3
Volcarona	BugFire	Fire SpinOverheat	33.9
Darmanitan	Fire	Fire FangOverheat	33.8
Groudon	Ground	Mud ShotPrecipice BladesLegacy	32.7
Moltres	FireFlying	Fire SpinOverheat	32.4

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

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

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

Questions people ask

What is Lucario weak to in Pokémon GO?

Lucario takes 1.6 times from Fighting, Ground and Fire.

What's the best counter to Lucario?

Blacephalon with Incinerate and Mind Blown, worth 45.8 damage per second against Lucario's own defense. The full ranking is above.