Weak toBug ×2.56FlyingPoisonGhostFireIceDark ×1.6

Attacker	Type	Moveset	DPS
Pheromosa	BugFighting	Bug BiteBug Buzz	43.4
Volcarona	BugFire	Bug BiteBug Buzz	36.5
Kartana	GrassSteel	Fury CutterX Scissor	35.7
Blacephalon	FireGhost	IncinerateMind BlownLegacy	34.8
Heracross	BugFighting	Fury CutterMegahorn	34.4
Kleavor	BugRock	Fury CutterX Scissor	34.0
Genesect	BugSteel	Fury CutterX Scissor	33.9
Vikavolt	BugElectric	Bug BiteX Scissor	33.7
Yanmega	BugFlying	Bug BiteBug Buzz	32.2
Pinsir	Bug	Fury CutterX Scissor	32.1
Frosmoth	IceBug	Bug BiteBug Buzz	32.1
Escavalier	BugSteel	Bug BiteMegahorn	31.9

Rainy boosts the Bug attacks above. Clear and Windy boost Iron Leaves.

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

Iron Leaves's moveset, CP and shiny All counters Raid board

Questions people ask

What is Iron Leaves weak to in Pokémon GO?

Iron Leaves takes 2.56 times damage from Bug, and 1.6 times from Flying, Poison, Ghost, Fire, Ice and Dark.

What's the best counter to Iron Leaves?

Pheromosa with Bug Bite and Bug Buzz, worth 43.4 damage per second against Iron Leaves's own defense. The full ranking is above.