TR39

TR39 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. TR39 is Superpower.

Game descriptions

Sword, Shield:(Watt Trader - 8000W)
Sword, Shield, B.Diamond, S.Pearl:The user attacks the target with great power. However, this also lowers the user’s Attack and Defense stats.
Scarlet, Violet:The user attacks the target with great power. However, this also lowers the user’s Attack and Defense stats.