Weak toGround ×1.6

Attacker	Type	Moveset	DPS
Groudon	Ground	Mud ShotPrecipice BladesLegacy	31.3
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	30.2
Excadrill	GroundSteel	Mud SlapEarthquake	29.7
Mamoswine	IceGround	Mud SlapHigh Horsepower	29.2
Regigigas	Normal	Hidden PowerCrush GripLegacy	28.2
Rhyperior	GroundRock	Mud SlapEarthquake	28.2
Garchomp	DragonGround	Mud ShotEarthquake	27.9
Landorus	GroundFlying	Mud ShotEarth Power	27.8
Blacephalon	FireGhost	IncinerateMind BlownLegacy	27.4
Krookodile	GroundDark	Mud SlapEarthquake	26.9
Golurk	GroundGhost	Mud SlapEarth Power	25.6
Golem	RockGround	Mud SlapEarthquake	24.9

Clear boosts the Ground attacks above. Rainy boosts Raichu.

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

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

Questions people ask

What is Raichu weak to in Pokémon GO?

Raichu takes 1.6 times from Ground.

What's the best counter to Raichu?

Groudon with Mud Shot and Precipice Blades, worth 31.3 damage per second against Raichu's own defense. The full ranking is above.