Weak toFlyingPoisonBugFireIce ×1.6

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	IncinerateMind BlownLegacy	39.8
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	34.0
Reshiram	DragonFire	Fire FangFusion FlareLegacy	33.0
Pheromosa	BugFighting	Bug BiteBug Buzz	30.9
Salamence	DragonFlying	Fire FangFly	30.4
Chandelure	GhostFire	Fire SpinOverheat	30.2
Moltres	FireFlying	Fire SpinFly	30.0
Cinderace	Fire	Fire SpinPyroball	29.8
Enamorus	FairyFlying	Fairy WindFly	29.6
Volcarona	BugFire	Fire SpinOverheat	29.5
Darmanitan	Fire	Fire FangOverheat	29.4
Yveltal	DarkFlying	GustOblivion WingLegacy	29.3

Clear boosts the Fire attacks above. Clear boosts Rillaboom.

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

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

Questions people ask

What is Rillaboom weak to in Pokémon GO?

Rillaboom takes 1.6 times from Flying, Poison, Bug, Fire and Ice.

What's the best counter to Rillaboom?

Blacephalon with Incinerate and Mind Blown, worth 39.8 damage per second against Rillaboom's own defense. The full ranking is above.