Embark on a wild karate adventure SpongeBob style! Master Udon is up to no good and has squirrel-napped Sandy. Foil this madcap plan by joining forces with martial arts masters SpongeBob and Patrick. Focus all your force to kick, chop and think your way through the hidden dangers all the way to the Ninja Castle. Once Sandy"s saved, wipe your brow and take a bow. And, you can customize your game online with the math skills you"re studying in school. For use with the Didj Custom Gaming System, sold separately.