Unlike the Isle of Armor, the Crown Tundra has very different terrain than The Galar Region. The Crown Tundra is a rather wide area in a very cold climate, containing various mountain regions with very few small communities. What makes the Crown Tundra is that it is home to various Dynamax Adventures that will allow players to find Legendary Pokemon, both new and old, in Max Raid Battles. Players will also go on various expeditions with the help of Peony and his daughter, on their way to finding the mysterious Legendary Pokemon Calyrex.
We have questions and answers related to this topic which may also help you: