Weak toFightingGroundBugFairy ×1.6

Attacker	Type	Moveset	DPS
Lucario	FightingSteel	Force PalmAura SphereLegacy	45.4
Pheromosa	BugFighting	Bug BiteFocus Blast	44.1
Kartana	GrassSteel	Fury CutterSacred Sword	43.2
Terrakion	RockFighting	Double KickSacred SwordLegacy	41.4
Blaziken	FireFighting	CounterAura Sphere	41.0
Enamorus	FairyFlying	Fairy WindDazzling Gleam	38.3
Groudon	Ground	Mud ShotPrecipice BladesLegacy	38.2
Conkeldurr	Fighting	Force PalmFocus Blast	37.8
Keldeo	WaterFighting	Low KickSacred Sword	37.5
Breloom	GrassFighting	Force PalmDynamic Punch	37.4
Urshifu	Fighting	CounterDynamic Punch	37.1
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	36.8

Overcast boosts the Fighting attacks above. Fog and Rainy boost Morpeko.

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

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

Questions people ask

What is Morpeko weak to in Pokémon GO?

Morpeko takes 1.6 times from Fighting, Ground, Bug and Fairy.

What's the best counter to Morpeko?

Lucario with Force Palm and Aura Sphere, worth 45.4 damage per second against Morpeko's own defense. The full ranking is above.