Weak toFlyingGhostFairy ×1.6

Attacker	Type	Moveset	DPS
Enamorus	FairyFlying	Fairy WindFly	36.3
Blacephalon	FireGhost	AstonishShadow Ball	35.2
Yveltal	DarkFlying	GustOblivion WingLegacy	32.1
Toucannon	NormalFlying	PeckBeak BlastLegacy	31.8
Moltres	FireFlying	Wing AttackFly	31.6
Chandelure	GhostFire	HexShadow Ball	31.4
Gengar	GhostPoison	LickShadow BallLegacy	31.4
Staraptor	NormalFlying	GustFlyLegacy	31.2
Tapu Lele	PsychicFairy	AstonishNatures MadnessLegacy	30.3
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	30.0
Dragapult	DragonGhost	AstonishShadow Ball	29.9
Salamence	DragonFlying	Dragon TailFly	29.4

Windy boosts the Flying attacks above. Overcast and Windy boost Medicham.

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

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

Questions people ask

What is Medicham weak to in Pokémon GO?

Medicham takes 1.6 times from Flying, Ghost and Fairy.

What's the best counter to Medicham?

Enamorus with Fairy Wind and Fly, worth 36.3 damage per second against Medicham's own defense. The full ranking is above.