Weak toGround ×1.6

Attacker	Type	Moveset	DPS
Groudon	Ground	Mud ShotPrecipice BladesLegacy	55.9
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	53.9
Excadrill	GroundSteel	Mud SlapEarthquake	53.0
Mamoswine	IceGround	Mud SlapHigh Horsepower	52.1
Regigigas	Normal	Hidden PowerCrush GripLegacy	50.3
Rhyperior	GroundRock	Mud SlapEarthquake	50.3
Garchomp	DragonGround	Mud ShotEarthquake	49.8
Landorus	GroundFlying	Mud ShotEarth Power	49.5
Blacephalon	FireGhost	IncinerateMind BlownLegacy	48.9
Krookodile	GroundDark	Mud SlapEarthquake	47.9
Golurk	GroundGhost	Mud SlapEarth Power	45.7
Golem	RockGround	Mud SlapEarthquake	44.4

Clear boosts the Ground attacks above. Rainy boosts Tynamo.

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

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

Questions people ask

What is Tynamo weak to in Pokémon GO?

Tynamo takes 1.6 times from Ground.

What's the best counter to Tynamo?

Groudon with Mud Shot and Precipice Blades, worth 55.9 damage per second against Tynamo's own defense. The full ranking is above.