Hello,
I'm posting this to see what one might be willing to offer for it. I am a collector of all things classic gaming and don't really want to part with it as it is the prize of my collection and undoubtedly the most rare video game i own. In the past 5+ years I have not seen one of these on ebay or on any video game forum. I'm not sure how many were made, but if you search the net you can find some basic information on it.
It is Undake 30 (same game) a mario puzzle game, produced by Hudson and released to Japanese game stores in a very limited supply. It has an interface similar to Super Mario Brothers 3.
UPDATE: HERE ARE SOME PICS I TOOK THIS MORNING OF THE FRONT AND BACK OF THE CARTRIDGE. ENJOY.
PM me with any serious interest. Thank you.
Jay