Weak toRockElectricIce ×1.6

Attacker	Type	Moveset	DPS
Regieleki	Electric	Lock OnThunder CageLegacy	93.2
Zeraora	Electric	Volt SwitchPlasma Fists	80.0
Zekrom	DragonElectric	Charge BeamFusion BoltLegacy	78.2
Xurkitree	Electric	Thunder ShockDischarge	77.3
Glimmora	RockPoison	Rock ThrowMeteor Beam	70.6
Rampardos	Rock	Smack DownRock Slide	70.0
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	67.7
Deoxys	Psychic	Charge BeamThunderbolt	67.3
Gigalith	Rock	Lock OnMeteor BeamLegacy	67.2
Electivire	Electric	Thunder ShockWild Charge	66.9
Tyrantrum	RockDragon	Rock ThrowMeteor Beam	65.5
Raikou	Electric	Volt SwitchWild Charge	65.1

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

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

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

Questions people ask

What is Pikipek weak to in Pokémon GO?

Pikipek takes 1.6 times from Rock, Electric and Ice.

What's the best counter to Pikipek?

Regieleki with Lock On and Thunder Cage, worth 93.2 damage per second against Pikipek's own defense. The full ranking is above.