Questions about a Super Joy III Famiclone.

So I just got an eBay lot in the mail today and found some interesting stuff in it. I was after the model 3 Sega Genesis being advertised in description. I also found a Super Joystick 3 NES/ Famiclone in it. It is grey, comes with the light gun, a battery pack, and even a Famicom game cart slot. Info says these ones can play unlicensed NES/ Famicom games. Are they limited to pirates or can any game be used as long as the Famicom to NES adapter is used for USA games?

 

Most USA games should play, as best they can with a typical famiclone's quality...

Not really recommended on this model due to its cart slot location. An NES game plus adapter will be unstable to hold at like 3x the length of basic Famicom games.

 

Right. I wanted to know for something else entirely. I thought that I might could use a flash cart on it, put the main board in a NES controller and have a handheld game console capable of most NES and Famicom games to plug into a TV. Thinking it might be good to try and sell if I get off my lazy ass and actually do it.