Weak toFlyingPsychicFairy ×1.6

Attacker	Type	Moveset	DPS
Mewtwo	Psychic	ConfusionPsystrikeLegacy	67.4
Enamorus	FairyFlying	Fairy WindFly	65.1
Tapu Lele	PsychicFairy	ConfusionNatures MadnessLegacy	60.7
Yveltal	DarkFlying	GustOblivion WingLegacy	57.6
Alakazam	Psychic	ConfusionPsychicLegacy	57.5
Toucannon	NormalFlying	PeckBeak BlastLegacy	57.1
Moltres	FireFlying	Wing AttackFly	56.8
Staraptor	NormalFlying	GustFlyLegacy	56.0
Azelf	Psychic	ConfusionFuturesight	55.8
Hoopa	PsychicGhost	ConfusionPsychic	55.5
Espeon	Psychic	ConfusionPsychic	55.5
Regigigas	Normal	Zen HeadbuttCrush GripLegacy	55.4

Windy boosts the Psychic attacks above. Overcast boosts Riolu.

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

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

Questions people ask

What is Riolu weak to in Pokémon GO?

Riolu takes 1.6 times from Flying, Psychic and Fairy.

What's the best counter to Riolu?

Mewtwo with Confusion and Psystrike, worth 67.4 damage per second against Riolu's own defense. The full ranking is above.