Pokémon Sword and Shield expansion The Crown Tundra comes out 23rd October 2020 (or 22nd October in North America). It lets players capture every legendary Pokémon that's ever appeared in the main series, The Pokémon Company announced today.
Some will be exclusive to specific versions, however, meaning you'll need both Sword and Shield's expansion pass (or a friend with the other version) to complete your collection.
New versions of Pokémon Sword and Shield with the games' expansion pass included will be sold from 6th November.