Weak toFighting ×1.6

Attacker	Type	Moveset	DPS
Lucario	FightingSteel	Force PalmAura SphereLegacy	67.1
Pheromosa	BugFighting	Low KickFocus Blast	61.4
Terrakion	RockFighting	Double KickSacred SwordLegacy	61.1
Blaziken	FireFighting	CounterAura Sphere	60.6
Kartana	GrassSteel	Fury CutterSacred Sword	57.9
Conkeldurr	Fighting	Force PalmFocus Blast	55.9
Keldeo	WaterFighting	Low KickSacred Sword	55.4
Breloom	GrassFighting	Force PalmDynamic Punch	55.2
Urshifu	Fighting	CounterDynamic Punch	54.8
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	54.5
Marshadow	FightingGhost	CounterClose Combat	53.5
Mewtwo	Psychic	CounterFocus BlastLegacy	53.3

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

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

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

Questions people ask

What is Happiny weak to in Pokémon GO?

Happiny takes 1.6 times from Fighting.

What's the best counter to Happiny?

Lucario with Force Palm and Aura Sphere, worth 67.1 damage per second against Happiny's own defense. The full ranking is above.