Weak toFightingRockSteelFire ×1.6

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	IncinerateMind BlownLegacy	34.6
Lucario	FightingSteel	Force PalmAura SphereLegacy	29.4
Reshiram	DragonFire	Fire FangFusion FlareLegacy	28.8
Pheromosa	BugFighting	Low KickFocus Blast	26.9
Terrakion	RockFighting	Double KickSacred SwordLegacy	26.8
Blaziken	FireFighting	CounterAura Sphere	26.6
Chandelure	GhostFire	Fire SpinOverheat	26.3
Cinderace	Fire	Fire SpinPyroball	26.0
Volcarona	BugFire	Fire SpinOverheat	25.7
Metagross	SteelPsychic	Bullet PunchMeteor MashLegacy	25.7
Darmanitan	Fire	Fire FangOverheat	25.6
Kartana	GrassSteel	Fury CutterSacred Sword	25.4

Overcast boosts the Fighting attacks above. Snow boosts Eiscue.

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

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

Questions people ask

What is Eiscue weak to in Pokémon GO?

Eiscue takes 1.6 times from Fighting, Rock, Steel and Fire.

What's the best counter to Eiscue?

Blacephalon with Incinerate and Mind Blown, worth 34.6 damage per second against Eiscue's own defense. The full ranking is above.