Weak toGroundRockGhostWaterDark ×1.6

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	AstonishShadow Ball	23.5
Inteleon	Water	Water GunHydro CannonLegacy	21.3
Kyogre	Water	WaterfallOrigin PulseLegacy	21.2
Darkrai	Dark	SnarlShadow Ball	21.1
Chandelure	GhostFire	HexShadow Ball	21.0
Gengar	GhostPoison	LickShadow BallLegacy	20.9
Glimmora	RockPoison	Rock ThrowMeteor Beam	20.9
Groudon	Ground	Mud ShotPrecipice BladesLegacy	20.8
Rampardos	Rock	Smack DownRock Slide	20.7
Absol	Dark	SnarlBrutal SwingLegacy	20.5
Kingler	Water	BubbleCrabhammer	20.1
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	20.0

Fog boosts the Ghost attacks above. Clear and Windy boost Mega Delphox.

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

Mega Delphox's moveset, stats and CP All counters Raid board

Questions people ask

What is Mega Delphox weak to in Pokémon GO?

Mega Delphox takes 1.6 times from Ground, Rock, Ghost, Water and Dark.

What's the best counter to Mega Delphox?

Blacephalon with Astonish and Shadow Ball, worth 23.5 damage per second against Mega Delphox's own defense. The full ranking is above.