Weak toFightingFlyingPsychicFairy ×1.6

Attacker	Type	Moveset	DPS
Mewtwo	Psychic	ConfusionPsystrikeLegacy	27.4
Lucario	FightingSteel	Force PalmAura SphereLegacy	26.9
Enamorus	FairyFlying	Fairy WindFly	26.4
Pheromosa	BugFighting	Low KickFocus Blast	24.7
Tapu Lele	PsychicFairy	ConfusionNatures MadnessLegacy	24.6
Terrakion	RockFighting	Double KickSacred SwordLegacy	24.6
Blaziken	FireFighting	CounterAura Sphere	24.4
Yveltal	DarkFlying	GustOblivion WingLegacy	23.4
Alakazam	Psychic	ConfusionPsychicLegacy	23.4
Toucannon	NormalFlying	PeckBeak BlastLegacy	23.2
Moltres	FireFlying	Wing AttackFly	23.1
Kartana	GrassSteel	Air SlashSacred Sword	22.9

Overcast boosts the Fighting attacks above. Overcast and Partly cloudy boost Mega Lopunny.

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

Mega Lopunny's moveset, stats and CP All counters Raid board

Questions people ask

What is Mega Lopunny weak to in Pokémon GO?

Mega Lopunny takes 1.6 times from Fighting, Flying, Psychic and Fairy.

What's the best counter to Mega Lopunny?

Mewtwo with Confusion and Psystrike, worth 27.4 damage per second against Mega Lopunny's own defense. The full ranking is above.