The Moon is an anthropomorphic moon and minor character from two episodes.
Full Moon - In a brief appearance, it rammed into the Sun to make it night. It only appeared in Sing Beans and had no lines.
Half Moon - When Chowder is going to live with the dragons, he made his hat into a hot-air balloon and crashed into it when it's sleeping, making it mad. It only appeared in The Fire Breather and had no lines in the entire episode.