How do you see creselia on pokemon pearl?

In Pokémon Pearl, Cresselia is a Legendary Pokémon known for its graceful appearance and unique ability to induce sleep in others. It can be found on Fullmoon Island after defeating the Elite Four and is often sought after for its high Special Defense and Excellent support moves. Cresselia is also notable for its role in the game's lore, representing the moon and dreams. Capturing it can be a rewarding challenge for players.