TR51

TR51 teaches a move to a compatible Pokémon in Pokémon Sword & Shield. Technical Records are consumed after use, but can be re-bought from Watt Traders. TR51 is Dragon Dance.

Game descriptions

Sword, Shield:(Watt Trader - 2000W)
Sword, Shield, B.Diamond, S.Pearl:The user vigorously performs a mystic, powerful dance that raises its Attack and Speed stats.
Scarlet, Violet:The user vigorously performs a mystic, powerful dance that raises its Attack and Speed stats.