Weak toFightingFlyingPoisonBugFireIce ×1.6

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	IncinerateMind BlownLegacy	63.3
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	54.1
Lucario	FightingSteel	Force PalmAura SphereLegacy	53.7
Reshiram	DragonFire	Fire FangFusion FlareLegacy	52.5
Pheromosa	BugFighting	Bug BiteFocus Blast	52.1
Kartana	GrassSteel	Fury CutterSacred Sword	51.1
Terrakion	RockFighting	Double KickSacred SwordLegacy	48.9
Blaziken	FireFighting	CounterAura Sphere	48.5
Salamence	DragonFlying	Fire FangFly	48.5
Chandelure	GhostFire	Fire SpinOverheat	48.1
Moltres	FireFlying	Fire SpinFly	47.7
Cinderace	Fire	Fire SpinPyroball	47.4

Clear boosts the Fire attacks above. Clear and Partly cloudy boost Deerling.

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

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

Questions people ask

What is Deerling weak to in Pokémon GO?

Deerling takes 1.6 times from Fighting, Flying, Poison, Bug, Fire and Ice.

What's the best counter to Deerling?

Blacephalon with Incinerate and Mind Blown, worth 63.3 damage per second against Deerling's own defense. The full ranking is above.