Lol, I've just started collecting and asked this same Question via the contact form.
Anyhow I'm aware of these boxes:
- Rygar Cover http://www.videogamer.org/pic2.php?lynx+sys
- Warbirds Cover http://www.videogamer.org/pic2.php?lynx+warsys
- Batman bundle http://www.videogamer.org/pic2.php?lynx+batbund
- Batman bundle black box http://i.marktplaats.com/00/s/MzQ1WDU5NQ==/z/giEAAOxyUrZS5S-~/$_84.JPG
But I can't find any images on Google from the black boxed one, is this a legit one?