Samurai Dragon? If I remember rightly the trick was to wait until it swung down with its sword, move back, jump up and take a chunk out of its nose. The armour you can pick up off of the shogun type things can help a lot. Anyway, ignoring slightly homoerotic youthful obsessions, I don't use an emulator. I still have an original Sega Master System II (Complete with rectangular controller) which I just plug into the TV whenever I need to. Only other games I have for it is a 2 player Dracula type thing and Back to the Future.