Aside from sentimental value, Pokémon collected throughout the years can be rare and stronger than others when deciding what to transfer from Pokémon HOME to Pokémon Scarlet and Violet. At the end of May, Pokémon HOME compatibility shook up the Linked Battle scene, making way for Regulation D rules which will be the main format for Ranked Battle Matches and the Pokémon World Championships. Now, trainers should not only bring their beloved friends from years past, but take note of some of the best transfer-only Pokémon for these competitive battles.
https://screenrant.com/best-transfer-only-pokemon-scarlet-violet/