TR15

TR15 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. TR15 is Fire Blast.

Game descriptions

Sword, Shield:(Watt Trader - 8000W)
Sword, Shield, B.Diamond, S.Pearl:The target is attacked with an intense blast of all-consuming fire. This may also leave the target with a burn.
Scarlet, Violet:The target is attacked with an intense blast of all-consuming fire. This may also leave the target with a burn.