Super Mario Bros. Z the game is a Nintendo DS game based on the series made by Alvin-Earthworm. It will have two different sides to play on. One is where you play as Mario, Luigi, Sonic, Shadow, and Yoshi to find the seven Chaos Emeralds and defend the Mushroom Kingdom. The other is where you play as Mecha Sonic to collect the Chaos Emeralds and bring chaos and destruction to the Mushroom Kingdom.