Mario and Luigi receive a letter from a bewildered and lonely Bowser. For the day's activity, Mario and Luigi grow their mustaches. Three months later (and after a quick shave), the brothers decide to ride go-karts. While enjoying a very leisurely ride, they are suddenly attacked by a strange object. The brothers find a mysterious person hiding nearby who introduces himself as Ash Ketchum, a Pokemon Trainer from Kanto City. A very confusing conversation ensues.