Weak toRock ×2.56FlyingFireElectricIce ×1.6

Attacker	Type	Moveset	DPS
Glimmora	RockPoison	Rock ThrowMeteor Beam	55.0
Rampardos	Rock	Smack DownRock Slide	54.5
Tyrantrum	RockDragon	Rock ThrowMeteor Beam	51.0
Gigalith	Rock	Lock OnMeteor BeamLegacy	51.0
Rhyperior	GroundRock	Smack DownRock WreckerLegacy	49.3
Terrakion	RockFighting	Smack DownRock Slide	48.4
Blacephalon	FireGhost	IncinerateMind BlownLegacy	47.9
Tyranitar	RockDark	Smack DownStone EdgeLegacy	46.5
Regieleki	Electric	Lock OnThunder CageLegacy	45.4
Lycanroc	Rock	Rock ThrowStone Edge	44.3
Aggron	SteelRock	Smack DownMeteor Beam	43.0
Aerodactyl	RockFlying	Rock ThrowRock Slide	42.6

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

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

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

Questions people ask

What is Butterfree weak to in Pokémon GO?

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

What's the best counter to Butterfree?

Glimmora with Rock Throw and Meteor Beam, worth 55.0 damage per second against Butterfree's own defense. The full ranking is above.