Weak toGroundGhostFireDark ×1.6

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	IncinerateMind BlownLegacy	43.0
Reshiram	DragonFire	Fire FangFusion FlareLegacy	35.7
Chandelure	GhostFire	Fire SpinOverheat	32.7
Cinderace	Fire	Fire SpinPyroball	32.3
Volcarona	BugFire	Fire SpinOverheat	31.9
Darmanitan	Fire	Fire FangOverheat	31.8
Darkrai	Dark	SnarlShadow Ball	31.3
Gengar	GhostPoison	LickShadow BallLegacy	31.0
Blaziken	FireFighting	Fire SpinBlast BurnLegacy	30.8
Groudon	Ground	Mud ShotPrecipice BladesLegacy	30.7
Moltres	FireFlying	Fire SpinOverheat	30.4
Absol	Dark	SnarlBrutal SwingLegacy	30.4

Clear boosts the Fire attacks above. Snow and Windy boost Bronzor.

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

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

Questions people ask

What is Bronzor weak to in Pokémon GO?

Bronzor takes 1.6 times from Ground, Ghost, Fire and Dark.

What's the best counter to Bronzor?

Blacephalon with Incinerate and Mind Blown, worth 43.0 damage per second against Bronzor's own defense. The full ranking is above.