Weak toRock ×2.56FlyingFireElectricIce ×1.6

Attacker	Type	Moveset	DPS
Glimmora	RockPoison	Rock ThrowMeteor Beam	50.7
Rampardos	Rock	Smack DownRock Slide	50.2
Tyrantrum	RockDragon	Rock ThrowMeteor Beam	47.0
Gigalith	Rock	Lock OnMeteor BeamLegacy	47.0
Rhyperior	GroundRock	Smack DownRock WreckerLegacy	45.4
Terrakion	RockFighting	Smack DownRock Slide	44.6
Blacephalon	FireGhost	IncinerateMind BlownLegacy	44.1
Tyranitar	RockDark	Smack DownStone EdgeLegacy	42.9
Regieleki	Electric	Lock OnThunder CageLegacy	41.8
Lycanroc	Rock	Rock ThrowStone Edge	40.8
Aggron	SteelRock	Smack DownMeteor Beam	39.7
Aerodactyl	RockFlying	Rock ThrowRock Slide	39.2

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

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

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

Questions people ask

What is Masquerain weak to in Pokémon GO?

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

What's the best counter to Masquerain?

Glimmora with Rock Throw and Meteor Beam, worth 50.7 damage per second against Masquerain's own defense. The full ranking is above.