Azeryn

Hey guys. In the midst of buying some genesis games today, I found a copy of Lion King II. I really can't find out any information about this game. The only information I have been able to find really is this. http://bootleggames.wikia.com/wiki/The_Lion_King_II According to the images there, I have the real cart, not the reprint, with no box. So I know it is an unlicensed games made by Gamtec. Other than that, nothing really. Are these unlicensed games rare? Or are they common and are a dime a dozen? Any information that you guys may have would be helpful, or any resources that you may think may help me out. Thanks guys.

Can someone tell me what exactly this is? I know that it's a "cart" that you can put different ROMs into to play games, test games, etc. But what exactly is it? Is it a current devise that's on the market? Is it something someone built at home? Is it an actual device that was used back in the day and it's old? Has anyone seen this before? Thanks for your time.