Calyrex, Glastrier, and Spectrier are three Legendary Pokémon first discovered in the Crown Tundra of the Galar region. They were introduced in The Crown Tundra DLC for Pokémon Sword and Shield. Calyrex can take on one of two alternate forms by combining with Glastrier or Spectrier using the Reins of Unity. When riding Glastrier, it becomes Ice Rider Calyrex; when riding Spectrier, it becomes Shadow Rider Calyrex. According to legend, Glastrier or Spectrier had been terrorizing Freezington, ruling the area as the "lord of the tundra". One day, Calyrex was nursed back to health by Freezington's citizens. To repay the citizens, Calyrex defeated Glastrier/Spectrier and gained its loyalty, making the Pokémon its loyal steed. Afterwards, Calyrex ruled over the Crown Tundra—known as the King of Bountiful Harvests, it helped spread vegetation and supported the harvest every year with its loyal steed. It was renowned for its graceful and regal movements.