Weak toFire ×2.56

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	IncinerateMind BlownLegacy	43.9
Reshiram	DragonFire	Fire FangFusion FlareLegacy	36.5
Chandelure	GhostFire	Fire SpinOverheat	33.4
Cinderace	Fire	Fire SpinPyroball	32.9
Volcarona	BugFire	Fire SpinOverheat	32.6
Darmanitan	Fire	Fire FangOverheat	32.5
Blaziken	FireFighting	Fire SpinBlast BurnLegacy	31.4
Moltres	FireFlying	Fire SpinOverheat	31.1
Volcanion	FireWater	IncinerateOverheat	30.8
Heatran	FireSteel	Fire SpinMagma StormLegacy	30.7
Flareon	Fire	Fire SpinOverheat	30.5
Delphox	FirePsychic	Fire SpinBlast BurnLegacy	30.1

Clear boosts the Fire attacks above. Rainy and Snow boost Mega Scizor.

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

Mega Scizor's moveset, stats and CP All counters Raid board

Questions people ask

What is Mega Scizor weak to in Pokémon GO?

Mega Scizor takes 2.56 times damage from Fire.

What's the best counter to Mega Scizor?

Blacephalon with Incinerate and Mind Blown, worth 43.9 damage per second against Mega Scizor's own defense. The full ranking is above.