Cosmoem

Cosmoem, known as コスモウム in Japanese, is a Psychic-type Legendary Pokémon introduced in Generation VII. It evolves from Cosmog and is the pre-evolution of Solgaleo and Lunala. Cosmoem has a unique appearance, resembling a translucent, dark-blue orb with a starscape pattern encased in a golden shell. It has a black core at the center, making it look like an eye. Known as the 'Protostar Pokémon,' Cosmoem is immobile, growing by absorbing starlight and dust from the air. Despite its small size, it is incredibly heavy, being one of the heaviest Pokémon known. In the games, Cosmoem evolves from Cosmog at level 43 and evolves into either Solgaleo (during the day) or Lunala (at night) at level 53, depending on the game. Its shell is incredibly sturdy, referred to as the 'cocoon of the stars.'