TR91 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.
TR91 is Venom Drench.
(Watt Trader - 2000W)
|Opposing Pokémon are drenched in an odd poisonous liquid. This lowers the Attack, Sp. Atk, and Speed stats of a poisoned target.|