Weak toRockElectricIce ×1.6

Attacker	Type	Moveset	DPS
Regieleki	Electric	Lock OnThunder CageLegacy	36.3
Zeraora	Electric	Volt SwitchPlasma Fists	31.2
Zekrom	DragonElectric	Charge BeamFusion BoltLegacy	30.4
Xurkitree	Electric	Thunder ShockDischarge	30.1
Glimmora	RockPoison	Rock ThrowMeteor Beam	27.5
Rampardos	Rock	Smack DownRock Slide	27.3
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	26.4
Deoxys	Psychic	Charge BeamThunderbolt	26.2
Gigalith	Rock	Lock OnMeteor BeamLegacy	26.2
Electivire	Electric	Thunder ShockWild Charge	26.1
Tyrantrum	RockDragon	Rock ThrowMeteor Beam	25.5
Raikou	Electric	Volt SwitchWild Charge	25.4

Rainy boosts the Electric attacks above. Partly cloudy and Windy boost Mega Pidgeot.

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

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

Questions people ask

What is Mega Pidgeot weak to in Pokémon GO?

Mega Pidgeot takes 1.6 times from Rock, Electric and Ice.

What's the best counter to Mega Pidgeot?

Regieleki with Lock On and Thunder Cage, worth 36.3 damage per second against Mega Pidgeot's own defense. The full ranking is above.