Weak toBugGhostDark ×1.6

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	AstonishShadow Ball	36.0
Pheromosa	BugFighting	Bug BiteBug Buzz	34.8
Darkrai	Dark	SnarlShadow Ball	32.4
Chandelure	GhostFire	HexShadow Ball	32.2
Gengar	GhostPoison	LickShadow BallLegacy	32.1
Absol	Dark	SnarlBrutal SwingLegacy	31.5
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	30.7
Dragapult	DragonGhost	AstonishShadow Ball	30.7
Hoopa	PsychicGhost	AstonishShadow Ball	30.1
Lunala	PsychicGhost	Shadow ClawShadow Ball	30.1
Gholdengo	SteelGhost	HexShadow Ball	30.0
Zoroark	Dark	SnarlFoul Play	30.0

Fog boosts the Ghost attacks above. Windy boosts Reuniclus.

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

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

Questions people ask

What is Reuniclus weak to in Pokémon GO?

Reuniclus takes 1.6 times from Bug, Ghost and Dark.

What's the best counter to Reuniclus?

Blacephalon with Astonish and Shadow Ball, worth 36.0 damage per second against Reuniclus's own defense. The full ranking is above.