MK Duo didn`t come out for saturn, but mk2 came out as a solo release as was already mentioned. On a related topic, MK Duo was released for the pc quite a while back. Mk2 was the same as the prior pc release, but MK1 featured greatly improved sound- arcade perfect if i recall (both sound fx and music. I think the music was recorded as wav files, but I don`t remember). I`ve been wanted this game for a while now- perfect for my old ass laptop, but can`t ever find it.
BTW, anybody ever play MK2 beta on psx? If so, waddya think? I`ve been wanting to try it for awhile