Weak toFightingGrassElectric ×1.6

Attacker	Type	Moveset	DPS
Regieleki	Electric	Lock OnThunder CageLegacy	51.5
Lucario	FightingSteel	Force PalmAura SphereLegacy	46.0
Zeraora	Electric	Volt SwitchPlasma Fists	44.2
Kartana	GrassSteel	Razor LeafLeaf Blade	44.1
Zekrom	DragonElectric	Charge BeamFusion BoltLegacy	43.2
Xurkitree	Electric	Thunder ShockDischarge	42.7
Pheromosa	BugFighting	Low KickFocus Blast	42.2
Terrakion	RockFighting	Double KickSacred SwordLegacy	42.0
Blaziken	FireFighting	CounterAura Sphere	41.6
Breloom	GrassFighting	Force PalmGrass KnotLegacy	39.5
Conkeldurr	Fighting	Force PalmFocus Blast	38.4
Keldeo	WaterFighting	Low KickSacred Sword	38.0

Rainy boosts the Electric attacks above. Partly cloudy and Rainy boost Bibarel.

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

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

Questions people ask

What is Bibarel weak to in Pokémon GO?

Bibarel takes 1.6 times from Fighting, Grass and Electric.

What's the best counter to Bibarel?

Regieleki with Lock On and Thunder Cage, worth 51.5 damage per second against Bibarel's own defense. The full ranking is above.