Trapped inside a magical music box, the invincible Wario is on a dangerous quest to help a mysterious figure recover its lost powers! Smash, bash and crash your way through more than two dozen gigantic levels in search of hidden keys, valuable treasures and mystical music boxes. Test your wits on puzzle after intricate puzzle and flex your muscles in action-packed boss fights! Be wary of Wanderin' Gooms, Hammer-bots, Mad Scienstein and more as you plunge into one of the largest, most dazzling adventures ever to hit Game Boy Color!

One day, Wario is flying with his plane over the woods until it runs out of gas and crashes. Unharmed, Wario then stumbles upon a mysterious cave. Inside the cave, he discovers a magical music box. He wants to take a closer look, and that causes him to be suddenly sucked into the music box. In the music box, a mysterious figure informs Wario that he is a god who once protected the world inside the music box, until an evil being sealed away his magical powers in five music boxes. In exchange for freeing it, the figure promises to send Wario back to his own world and let him keep any treasure he finds. With his mind on the money and the fact he can return to his own world, Wario departs on his quest, in search of the music boxes and the many treasures of this mysterious land.