Weak toFighting ×1.6

Attacker	Type	Moveset	DPS
Lucario	FightingSteel	Force PalmAura SphereLegacy	46.8
Pheromosa	BugFighting	Low KickFocus Blast	42.8
Terrakion	RockFighting	Double KickSacred SwordLegacy	42.6
Blaziken	FireFighting	CounterAura Sphere	42.3
Kartana	GrassSteel	Fury CutterSacred Sword	40.3
Conkeldurr	Fighting	Force PalmFocus Blast	39.0
Keldeo	WaterFighting	Low KickSacred Sword	38.6
Breloom	GrassFighting	Force PalmDynamic Punch	38.5
Urshifu	Fighting	CounterDynamic Punch	38.2
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	38.0
Marshadow	FightingGhost	CounterClose Combat	37.3
Mewtwo	Psychic	CounterFocus BlastLegacy	37.2

Overcast boosts the Fighting attacks above. Partly cloudy boosts Munchlax.

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

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

Questions people ask

What is Munchlax weak to in Pokémon GO?

Munchlax takes 1.6 times from Fighting.

What's the best counter to Munchlax?

Lucario with Force Palm and Aura Sphere, worth 46.8 damage per second against Munchlax's own defense. The full ranking is above.