Best Answer: Y-Comm is a new feature introduced in Pokémon Sword and Shield that serves as the place where you can trade Pokémon, have Link Battles, as well as send and receive notifications about participating in Max Raid Battles. All of these use either online or local communication. Any online communication requires an active Nintendo Switch Online subscription.Go, Zacian!: Pokémon Sword ($60 at Amazon)Go, Zamazenta!: Pokémon Shield ($60 at Amazon)