The makers of this cartridge call themselves "Video Deon Japan", which is a bad interpretation of the amalgamated words Video and Odeon. Just look at the label below. It's pretty damn weird, with painted pictures of movies from the '70s. (I identified all 9 movies; can you?) They obviously ripped off a poster from a video store, or something. And, below the picture is an indication "1 Player 2 Players". Why? The game is only 1-player. Finally, you can see the text, "Use your Joystick Controllers with this game cartridge". Hmm... okay... If you can't even figure that out, then you stand no chance playing this game. Oh, jeez! And all this time I was using my egg beaters with this game cartridge. No wonder I kept on getting such low scores!
Inside the cart are two PCBs, one which is the main game board, and the other which is a Famicom-to-NES adaptor. Click on the image below and you'll see the chips. The mapper has already been reverse-engineered, so you should easily be able to find info on the Internet about how the game (ROM) works. Because the FDS loads games in at $6000 in RAM, this mapper maps portions of ROM to this location. Pretty weird, and a pretty neat achievement. (But why does the ROM contain bits of Pac-Man code and graphics???) Click on the images below to view the full image.
Below are images from the FDS version of Ai Senshi Nicol. You can also read my review of the game at |tsr's website: http://atarihq.com/tsr/fds/Nicol.html