Weak toFlyingGhostFireIceDark ×1.6

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	IncinerateMind BlownLegacy	61.7
Reshiram	DragonFire	Fire FangFusion FlareLegacy	51.2
Salamence	DragonFlying	Fire FangFly	47.2
Yveltal	DarkFlying	SnarlOblivion WingLegacy	47.0
Chandelure	GhostFire	Fire SpinOverheat	46.9
Honchkrow	DarkFlying	SnarlBrave Bird	46.5
Moltres	FireFlying	Fire SpinFly	46.5
Enamorus	FairyFlying	AstonishFly	46.3
Cinderace	Fire	Fire SpinPyroball	46.2
Volcarona	BugFire	Fire SpinOverheat	45.7
Darmanitan	Fire	Fire FangOverheat	45.6
Chien-Pao	DarkIce	SnarlBlizzard	45.1

Clear boosts the Fire attacks above. Clear and Fog boost Phantump.

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

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

Questions people ask

What is Phantump weak to in Pokémon GO?

Phantump takes 1.6 times from Flying, Ghost, Fire, Ice and Dark.

What's the best counter to Phantump?

Blacephalon with Incinerate and Mind Blown, worth 61.7 damage per second against Phantump's own defense. The full ranking is above.