Calyrex

Calyrex (Japanese: バドレックス Budrex) is a dual-type Psychic/Grass Legendary Pokémon introduced during Generation VIII, in The Crown Tundra.

While it is not known to evolve into or from any other Pokémon, Calyrex has two additional forms, which are activated by using the Reins of Unity on it and either Glastrier or Spectrier, resulting in a process that removes Glastrier or Spectrier from the player's party until the fusion is undone. It will then become Ice Rider Calyrex (dual-type Psychic/Ice fusion with Glastrier) or Shadow Rider Calyrex (dual-type Psychic/Ghost fusion with Spectrier).

(Refer to Game data→Form data for more details.)

Calyrex is the game mascot of The Crown Tundra, appearing on the boxarts of the Pokémon Sword and Shield Expansion Pass in its base form.