You are given a Crown Ticket when the game updates and you have the DLC. This allows you to take a train to the Crown Tundra. Sonia is there researching strange Dynamax spots. The story is split into 4 parts. The first has you collect a fruit from the Legendary Birds' tree you fight one based on your starter. The second one, you need to travel to a nearby village to recruit Peony and go into a temple in search of either Regieleki or Regidrago. You have to catch one of them. Once you pick one, you can't choose again. In the third, an Ultra Wormhole appears. You have to fight and catch one of two new Ultra Beasts depending on your version. Afterwards a cutscene plays with an earthquake effect showing Calyrex has been awoken. In the final chapter, you have to go up to the tree atop the Royal Mountain to fight and catch it. You also meet Colress, who gives you the Calyrizer, which can fuse Calyrex and one of the two new Ultra Beasts. After the main story you can do Dynamax Adventure and encounter all old Legendary Pokémon and Ultra Beasts except Type: Null, Silvally, and the Regis. The Crown Tundra will release on November 17th.