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Moves, #359, Hammer Arm

Hammer Arm is learned by 37 species by level and 20 by egg

Of the 1,025 species this site covers, default forms only

ClassPhysical

Power100

Accuracy90%

PP10

Priority0

SinceGen IV

TargetSelected Pokémon

Effect, in PokéAPI's words

“Lowers user’s Speed by one stage.”

Who learns it

55 species in all, 8 of 12 games shown

Scarlet and Violet: 41 species
Species	Method	Level
Rhydon	Level up	Evolve
Metagross	Level up	Evolve
Reuniclus	Level up	Evolve
Garganacl	Level up	Evolve
Sudowoodo	Level up	1
Rhyperior	Level up	1
Chesnaught	Level up	1
Groudon	Level up	36
Timburr	Level up	36
Regirock	Level up	42
Regice	Level up	42
Registeel	Level up	42
Gurdurr	Level up	42
Conkeldurr	Level up	42
Regidrago	Level up	42
Snorlax	Level up	44
Golett	Level up	48
Golurk	Level up	52
Tornadus	Level up	55
Thundurus	Level up	55
Landorus	Level up	55
Slaking	Level up	63
Ursaring	Level up	64
Grimmsnarl	Level up	64
Ursaluna	Level up	64
Regigigas	Level up	66
Zarude	Level up	72
Geodude	Egg
Graveler	Egg
Golem	Egg
Electabuzz	Egg
Elekid	Egg
Swampert	Egg
Slakoth	Egg
Cranidos	Egg
Rampardos	Egg
Electivire	Egg
Emboar	Egg
Grookey	Egg
Thwackey	Egg
Rillaboom	Egg

Brilliant Diamond and Shining Pearl: 23 species
Species	Method	Level
Rhydon	Level up	Evolve, 1
Metagross	Level up	Evolve, 1
Kingler	Level up	1
Sudowoodo	Level up	1
Ursaring	Level up	1, 67
Swampert	Level up	1
Slaking	Level up	1, 61
Rhyperior	Level up	1
Groudon	Level up	36
Regirock	Level up	42
Regice	Level up	42
Registeel	Level up	42
Snorlax	Level up	44
Regigigas	Level up	66
Geodude	Egg
Krabby	Egg
Lickitung	Egg
Kangaskhan	Egg
Elekid	Egg
Miltank	Egg
Slakoth	Egg
Whismur	Egg
Cranidos	Egg

Sword and Shield: 39 species
Species	Method	Level
Rhydon	Level up	Evolve, 1
Metagross	Level up	Evolve, 1
Darmanitan	Level up	Evolve, 1
Reuniclus	Level up	Evolve, 1
Kingler	Level up	1
Sudowoodo	Level up	1
Swampert	Level up	1
Rhyperior	Level up	1
Stufful	Level up	32
Groudon	Level up	36
Timburr	Level up	36
Bewear	Level up	36
Regirock	Level up	42
Regice	Level up	42
Registeel	Level up	42
Gurdurr	Level up	42
Conkeldurr	Level up	42
Regidrago	Level up	42
Snorlax	Level up	44
Guzzlord	Level up	45
Golett	Level up	48
Golurk	Level up	52
Tornadus	Level up	55
Thundurus	Level up	55
Landorus	Level up	55
Diggersby	Level up	58
Pangoro	Level up	58
Buzzwole	Level up	60
Grimmsnarl	Level up	64
Regigigas	Level up	66
Zarude	Level up	72
Krabby	Egg
Lickitung	Egg
Kangaskhan	Egg
Elekid	Egg
Miltank	Egg
Whismur	Egg
Darumaka	Egg
Grookey	Egg

Ultra Sun and Ultra Moon: 37 species
Species	Method	Level
Rhydon	Level up	Evolve, 1
Metagross	Level up	Evolve, 1
Darmanitan	Level up	Evolve, 1
Ursaring	Level up	1, 67
Swampert	Level up	1, 63
Slaking	Level up	1, 61
Rhyperior	Level up	1
Emboar	Level up	1
Tornadus	Level up	1, 73
Thundurus	Level up	1, 73
Landorus	Level up	1, 73
Chesnaught	Level up	1, 72
Diggersby	Level up	1, 60
Pangoro	Level up	1, 70
Stufful	Level up	32
Bewear	Level up	36
Timburr	Level up	40
Guzzlord	Level up	43
Gurdurr	Level up	45
Conkeldurr	Level up	45
Buzzwole	Level up	47
Regirock	Level up	49
Regice	Level up	49
Registeel	Level up	49
Sudowoodo	Level up	50
Golett	Level up	55
Golurk	Level up	61
Groudon	Level up	80
Geodude	Egg
Lickitung	Egg
Kangaskhan	Egg
Elekid	Egg
Miltank	Egg
Slakoth	Egg
Whismur	Egg
Cranidos	Egg
Darumaka	Egg

Sun and Moon: 37 species
Species	Method	Level
Rhydon	Level up	Evolve, 1
Metagross	Level up	Evolve, 1
Darmanitan	Level up	Evolve, 1
Ursaring	Level up	1, 67
Swampert	Level up	1, 63
Slaking	Level up	1, 61
Rhyperior	Level up	1
Emboar	Level up	1
Tornadus	Level up	1, 73
Thundurus	Level up	1, 73
Landorus	Level up	1, 73
Chesnaught	Level up	1, 72
Diggersby	Level up	1, 60
Pangoro	Level up	1, 70
Stufful	Level up	32
Bewear	Level up	36
Timburr	Level up	40
Guzzlord	Level up	43
Gurdurr	Level up	45
Conkeldurr	Level up	45
Buzzwole	Level up	47
Regirock	Level up	49
Regice	Level up	49
Registeel	Level up	49
Sudowoodo	Level up	50
Golett	Level up	55
Golurk	Level up	61
Groudon	Level up	80
Geodude	Egg
Lickitung	Egg
Kangaskhan	Egg
Elekid	Egg
Miltank	Egg
Slakoth	Egg
Whismur	Egg
Cranidos	Egg
Darumaka	Egg

Omega Ruby and Alpha Sapphire: 33 species
Species	Method	Level
Ursaring	Level up	1, 67
Swampert	Level up	1, 63
Slaking	Level up	1, 61
Emboar	Level up	1
Tornadus	Level up	1, 79
Thundurus	Level up	1, 79
Landorus	Level up	1, 79
Chesnaught	Level up	1, 60
Diggersby	Level up	1, 60
Pangoro	Level up	1, 57
Darmanitan	Level up	35
Timburr	Level up	40
Rhydon	Level up	42
Rhyperior	Level up	42
Metagross	Level up	45
Gurdurr	Level up	45
Conkeldurr	Level up	45
Sudowoodo	Level up	47
Regirock	Level up	49
Regice	Level up	49
Registeel	Level up	49
Golett	Level up	50
Golurk	Level up	60
Groudon	Level up	80
Geodude	Egg
Lickitung	Egg
Kangaskhan	Egg
Elekid	Egg
Miltank	Egg
Slakoth	Egg
Whismur	Egg
Cranidos	Egg
Darumaka	Egg

X and Y: 33 species
Species	Method	Level
Ursaring	Level up	1, 67
Swampert	Level up	1, 69
Slaking	Level up	1, 67
Regirock	Level up	1, 81
Regice	Level up	1, 81
Registeel	Level up	1, 81
Emboar	Level up	1
Tornadus	Level up	1, 79
Thundurus	Level up	1, 79
Landorus	Level up	1, 79
Chesnaught	Level up	1, 60
Diggersby	Level up	1, 60
Pangoro	Level up	1, 57
Groudon	Level up	20
Darmanitan	Level up	35
Timburr	Level up	40
Rhydon	Level up	42
Rhyperior	Level up	42
Metagross	Level up	45
Gurdurr	Level up	45
Conkeldurr	Level up	45
Sudowoodo	Level up	47
Golett	Level up	50
Golurk	Level up	60
Geodude	Egg
Lickitung	Egg
Kangaskhan	Egg
Elekid	Egg
Miltank	Egg
Slakoth	Egg
Whismur	Egg
Cranidos	Egg
Darumaka	Egg

Black 2 and White 2: 30 species
Species	Method	Level
Emboar	Level up	1
Groudon	Level up	20
Darmanitan	Level up	35
Timburr	Level up	40
Rhydon	Level up	42
Rhyperior	Level up	42
Metagross	Level up	45
Gurdurr	Level up	45
Conkeldurr	Level up	45
Sudowoodo	Level up	47
Golett	Level up	50
Golurk	Level up	60
Ursaring	Level up	67
Slaking	Level up	67
Swampert	Level up	69
Tornadus	Level up	79
Thundurus	Level up	79
Landorus	Level up	79
Regirock	Level up	81
Regice	Level up	81
Registeel	Level up	81
Geodude	Egg
Lickitung	Egg
Kangaskhan	Egg
Elekid	Egg
Miltank	Egg
Slakoth	Egg
Whismur	Egg
Cranidos	Egg
Darumaka	Egg