Weak toFighting ×1.6

Attacker	Type	Moveset	DPS
Lucario	FightingSteel	Force PalmAura SphereLegacy	72.6
Pheromosa	BugFighting	Low KickFocus Blast	66.5
Terrakion	RockFighting	Double KickSacred SwordLegacy	66.2
Blaziken	FireFighting	CounterAura Sphere	65.7
Kartana	GrassSteel	Fury CutterSacred Sword	62.6
Conkeldurr	Fighting	Force PalmFocus Blast	60.5
Keldeo	WaterFighting	Low KickSacred Sword	60.0
Breloom	GrassFighting	Force PalmDynamic Punch	59.8
Urshifu	Fighting	CounterDynamic Punch	59.3
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	59.0
Marshadow	FightingGhost	CounterClose Combat	58.0
Mewtwo	Psychic	CounterFocus BlastLegacy	57.7

Overcast boosts the Fighting attacks above. Partly cloudy boosts Rattata.

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

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

Questions people ask

What is Rattata weak to in Pokémon GO?

Rattata takes 1.6 times from Fighting.

What's the best counter to Rattata?

Lucario with Force Palm and Aura Sphere, worth 72.6 damage per second against Rattata's own defense. The full ranking is above.