Weak toFlyingPsychicFairy ×1.6

Attacker	Type	Moveset	DPS
Mewtwo	Psychic	ConfusionPsystrikeLegacy	36.0
Enamorus	FairyFlying	Fairy WindFly	34.8
Tapu Lele	PsychicFairy	ConfusionNatures MadnessLegacy	32.4
Yveltal	DarkFlying	GustOblivion WingLegacy	30.8
Alakazam	Psychic	ConfusionPsychicLegacy	30.8
Toucannon	NormalFlying	PeckBeak BlastLegacy	30.5
Moltres	FireFlying	Wing AttackFly	30.4
Staraptor	NormalFlying	GustFlyLegacy	29.9
Azelf	Psychic	ConfusionFuturesight	29.8
Hoopa	PsychicGhost	ConfusionPsychic	29.7
Espeon	Psychic	ConfusionPsychic	29.7
Regigigas	Normal	Zen HeadbuttCrush GripLegacy	29.6

Windy boosts the Psychic attacks above. Overcast boosts Machamp.

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

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

Questions people ask

What is Machamp weak to in Pokémon GO?

Machamp takes 1.6 times from Flying, Psychic and Fairy.

What's the best counter to Machamp?

Mewtwo with Confusion and Psystrike, worth 36.0 damage per second against Machamp's own defense. The full ranking is above.