So, I just found it while looking for MD ROMs. There's no Sega logo so I guess it's unlicensed. It's a beat'em-up and actually it plays pretty well - and the options are translated to English! =P To those who have played it, what's your comment on it? It's pretty crude but controls are responsive and throwing enemies off screen is amazing. EDIT: screw that, you can throw enemies into pits! =D
Actually screw that, looks like I have a modified ROM, argh. Also "congratulations but this is not true ending" >=[ I hate when this stuff happens.