Suddenly, Bowser Jr. appears and kidnaps the princess. But Mario doesn't know that there are now 20 Ruby Eggs to find! Mario chases after Bowser Jr. and makes a mad dash to Bowser's Airship of Doom! Mario can't catch Bowser and save the day. Looks like Bowser's at it again.
World 1: Yoshi's Island
Mario's adventure has begun! Yoshi's Island is a beach/jungle world with an underwater level, a fortress, two underground levels, a beach level, a sky level, two jungle/temple levels, and Iggy's Castle.