The Mushroom Kingdom has been peaceful—a state maintained by Mario and Luigi over years of effort. But the Mushroom Kingdom shares a border with the Mushroom World, a connected realm where Bowser's seven children have arrived to cause chaos. Each of the seven has stolen a royal magic wand from one of the Mushroom World's kingdoms and used it to transform that kingdom's monarch into an animal. Mario and Luigi are sent to recover all seven wands, restore the kings, and send Bowser's children packing. Princess Peach and Toad wave them off. The GBA port adds e-Reader support for additional level content.