Hammer Arm — Pokémon Move

Lowers user’s Speed by one stage.

Type: fighting; class: physical; power: 100; accuracy: 90; PP: 10; priority: 0.

Effect notes

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

In-game descriptions by version

diamond pearlThe user swings and hits with its strong and heavy fist. It lowers the user’s Speed, however.
platinumThe user swings and hits with its strong and heavy fist. It lowers the user’s Speed, however.
heartgold soulsilverThe user swings and hits with its strong and heavy fist. It lowers the user’s Speed, however.
black whiteThe user swings and hits with its strong and heavy fist. It lowers the user’s Speed, however.
black 2 white 2The user swings and hits with its strong and heavy fist. It lowers the user’s Speed, however.
x yThe user swings and hits with its strong and heavy fist. It lowers the user’s Speed, however.
omega ruby alpha sapphireThe user swings and hits with its strong and heavy fist. It lowers the user’s Speed, however.
sun moonThe user swings and hits with its strong, heavy fist. It lowers the user’s Speed, however.
ultra sun ultra moonThe user swings and hits with its strong, heavy fist. It lowers the user’s Speed, however.
lets go pikachu lets go eeveeThe user swings and hits with its strong, heavy fist. It lowers the user’s Speed, however.
sword shieldThe user swings and hits with its strong, heavy fist. It lowers the user’s Speed, however.
legends arceusThe user swings and hits with its strong, heavy fist. It lowers the user's Speed, however.
scarlet violetThe user swings its strong, heavy fist at the target to inflict damage. This also lowers the user's Speed stat.

Pokémon that learn this move in scarlet-violet