Cresselia (Japanese: クレセリア Cresselia) is a Psychic-type Legendary Pokémon introduced in Generation IV.
It is not known to evolve into or from any other Pokémon.
It is a member of the Lunar duo with Darkrai.
Pokédex Entries:
Diamond/Pearl: Shiny particles are released from its wings like a veil. It is said to represent the crescent moon.
Heartgold/SoulSilver: Those who sleep holding Cresselia's feather are assured of joyful dreams. It is said to represent the crescent moon.
Black/White: On nights around the quarter moon, the aurora from its tail extends and undulates beautifully.