Dewy's Adventure: Suishou Dewy no Daibouken!!

Successfully complete Groovy Grasslands to have thefollowing options appear in the village in Story mode: CharacterGallery, Hall of Records, Music Gallery, Photo Gallery, and Tipsand Tricks.
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Dewy's theme song, called "Rainbow Smile" in the game, can be unlocked in the Music Gallery after completing the game. You can then listen to it at any time.