Weak toFighting ×1.6

Attacker	Type	Moveset	DPS
Lucario	FightingSteel	Force PalmAura SphereLegacy	24.4
Pheromosa	BugFighting	Low KickFocus Blast	22.3
Terrakion	RockFighting	Double KickSacred SwordLegacy	22.2
Blaziken	FireFighting	CounterAura Sphere	22.1
Kartana	GrassSteel	Fury CutterSacred Sword	21.1
Conkeldurr	Fighting	Force PalmFocus Blast	20.3
Keldeo	WaterFighting	Low KickSacred Sword	20.1
Breloom	GrassFighting	Force PalmDynamic Punch	20.1
Urshifu	Fighting	CounterDynamic Punch	19.9
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	19.8
Marshadow	FightingGhost	CounterClose Combat	19.5
Mewtwo	Psychic	CounterFocus BlastLegacy	19.4

Overcast boosts the Fighting attacks above. Partly cloudy boosts Arceus.

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

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

Questions people ask

What is Arceus weak to in Pokémon GO?

Arceus takes 1.6 times from Fighting.

What's the best counter to Arceus?

Lucario with Force Palm and Aura Sphere, worth 24.4 damage per second against Arceus's own defense. The full ranking is above.