Mario & Luigi: Partners in Time (2005)
Mario & Luigi: Partners in Time is a sequel to Mario & Luigi: Superstar Saga and follows the two brothers as they travel back in time to retrieve Princess Peach. Along the way, they encounter baby versions of themselves, Princess Peach and Bowser. Players must control both the adult and baby versions of Mario and Luigi, using the top screen to observe their surroundings, keep track of the pair not under their control or maximize combo moves during battle. This humorous adventure takes full advantage of Nintendo DS's dual screens for twice the fun with twice as many Mushroom Kingdom heroes!