Lot of misinformation going around re. Sword and Shield DLC. There are no following Pokemon, no Galarian Dustox and Beautifly and no return of Mega Evolutions or Z-Moves. Once you have completed the DLC and the main story, you can return to the Crown Tundra to learn more about Dynamax energy and the Darkest Day. Near the end of this postgame episode, you will meet a mysterious, giant man with a Floette.