Weak toFightingGroundElectric ×1.6

Attacker	Type	Moveset	DPS
Regieleki	Electric	Lock OnThunder CageLegacy	33.7
Lucario	FightingSteel	Force PalmAura SphereLegacy	30.7
Zeraora	Electric	Volt SwitchPlasma Fists	29.5
Zekrom	DragonElectric	Charge BeamFusion BoltLegacy	28.8
Xurkitree	Electric	Thunder ShockDischarge	28.4
Pheromosa	BugFighting	Low KickFocus Blast	28.1
Terrakion	RockFighting	Double KickSacred SwordLegacy	28.0
Blaziken	FireFighting	CounterAura Sphere	27.8
Groudon	Ground	Mud ShotPrecipice BladesLegacy	25.8
Conkeldurr	Fighting	Force PalmFocus Blast	25.6
Keldeo	WaterFighting	Low KickSacred Sword	25.4
Breloom	GrassFighting	Force PalmDynamic Punch	25.3

Rainy boosts the Electric attacks above. Rainy and Snow boost Empoleon.

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

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

Questions people ask

What is Empoleon weak to in Pokémon GO?

Empoleon takes 1.6 times from Fighting, Ground and Electric.

What's the best counter to Empoleon?

Regieleki with Lock On and Thunder Cage, worth 33.7 damage per second against Empoleon's own defense. The full ranking is above.