Hammer Arm

Lowers user's Speed by one stage.

Inflicts regular damage, then lowers the user's Speed by one stage.

48 Pokémon can learn this move

#074

Geodude

RockGroundKanto

#098

Krabby

WaterKanto

#099

Kingler

WaterKanto

#108

Lickitung

NormalKanto

#112

Rhydon

GroundRockKanto

#115

Kangaskhan

NormalKanto

#143

Snorlax

NormalKanto

#185

Sudowoodo

RockJohto

#217

Ursaring

NormalJohto

#239

Elekid

ElectricJohto

#241

Miltank

NormalJohto

#260

Swampert

WaterGroundHoenn

#287

Slakoth

NormalHoenn

#289

Slaking

NormalHoenn

#293

Whismur

NormalHoenn

#376

Metagross

SteelPsychicHoenn

#377

Regirock

RockHoenn

#378

Regice

IceHoenn

#379

Registeel

SteelHoenn

#383

Groudon

GroundHoenn

#408

Cranidos

RockSinnoh

#464

Rhyperior

GroundRockSinnoh

#486

Regigigas

NormalSinnoh

#500

Emboar

FireFightingUnova

#532

Timburr

FightingUnova

#533

Gurdurr

FightingUnova

#534

Conkeldurr

FightingUnova

#554

Darumaka

FireUnova

#555

Darmanitan

FireUnova

#579

Reuniclus

PsychicUnova

#622

Golett

GroundGhostUnova

#623

Golurk

GroundGhostUnova

#641

Tornadus

FlyingUnova

#642

Thundurus

ElectricFlyingUnova

#645

Landorus

GroundFlyingUnova

#652

Chesnaught

GrassFightingKalos

#660

Diggersby

NormalGroundKalos

#675

Pangoro

FightingDarkKalos

#759

Stufful

NormalFightingAlola

#760

Bewear

NormalFightingAlola

#794

Buzzwole

BugFightingAlola

#799

Guzzlord

DarkDragonAlola

#810

Grookey

GrassGalar

#861

Grimmsnarl

DarkFairyGalar

#893

Zarude

DarkGrassGalar

#895

Regidrago

DragonGalar

#901

Ursaluna

GroundNormalGalar

#934

Garganacl

RockPaldea