This is a parody of Super Mario Bros. that feature a guy that live in the city called Gavriel. When Gavriel and Marc, his brother, played with ther 3DS, a monster called Chunky Chonk has captured Marc and the 3DS. But he failed to capture Gavriel so you need to control him to the giant castle to beat Chunky Chonk's dad: Chunky Big and to rescue Marc and the 3DS.