Bowser, the token bad guy from the Mario Bros. series, is up to no good again in this educational game designed to teach children geography. This time he's set up his headquarters in Antarctica and created portals to 25 famous cities around the world, so that his Koopas can wreak havoc in our own world. He's also kidnapped Mario, hence the title of this game. You play as Luigi who must foil Bowser's plans by entering through each of the portals, tracking down the Koopas who have stolen famous artifacts, and looking for clues about your location. Once you've set everything right and determined where you are, you call Yoshi on your Globulator so he can track you down. You need Yoshi's help to eat the Pokey (a cactus-like creature) that's guarding the return portal, and when Luigi returns he can close the portal forever.