Weak toRock ×2.56FlyingFireElectricIce ×1.6

Attacker	Type	Moveset	DPS
Glimmora	RockPoison	Rock ThrowMeteor Beam	34.0
Rampardos	Rock	Smack DownRock Slide	33.7
Tyrantrum	RockDragon	Rock ThrowMeteor Beam	31.5
Gigalith	Rock	Lock OnMeteor BeamLegacy	31.5
Rhyperior	GroundRock	Smack DownRock WreckerLegacy	30.5
Terrakion	RockFighting	Smack DownRock Slide	29.9
Blacephalon	FireGhost	IncinerateMind BlownLegacy	29.6
Tyranitar	RockDark	Smack DownStone EdgeLegacy	28.8
Regieleki	Electric	Lock OnThunder CageLegacy	28.0
Lycanroc	Rock	Rock ThrowStone Edge	27.4
Aggron	SteelRock	Smack DownMeteor Beam	26.6
Aerodactyl	RockFlying	Rock ThrowRock Slide	26.3

Partly cloudy boosts the Rock attacks above. Rainy and Windy boost Mega Pinsir.

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

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

Questions people ask

What is Mega Pinsir weak to in Pokémon GO?

Mega Pinsir takes 2.56 times damage from Rock, and 1.6 times from Flying, Fire, Electric and Ice.

What's the best counter to Mega Pinsir?

Glimmora with Rock Throw and Meteor Beam, worth 34.0 damage per second against Mega Pinsir's own defense. The full ranking is above.