Arthur & the Invisibles - Game Boy Advance

Arthur and the Invisibles is a magical adventure where you'll discover another world in the backyard! When a boy named Arthur is visiting his grandmother, he begins exploring for treasure in the backyard. While there, he stumbles on the miniature world of the Invisibles. Arthur himself is transformed into an Invisible and soon meets two companions: Princess Selenia and her brother Betameche. With his two new friends, Arthur embarks upon an extraordinary adventure that is rich in surprise and intense action.