The Museum is a mysterious living structure who serves as the true antagonist of Klonoa: Moonlight Museum.
Museum is a large, selfish sentient museum that orders his four artist henchmen to take fragments of the moon itself and make arts with them, as it is said that the moon illuminates dreams. Museum believes that arts and dreams are the same thing, so he wants to make his own arts/dreams be illuminated by the moon, even if it means monopolizing it and taking away the dreams of others. Klonoa enters inside him (without knowing it's a living museum) to get the moon fragments back, as their sudden disappearance has made people stop dreaming. After finding out the truth and restoring the moon to the sky, Klonoa made Museum and his artists see their evil ways and want to be better people.