You know that company that makes those shitty re-released games? Should we add them as separate entries?
Honestly, I don't know much about Majesco, but they manufactured low quality SNES and Genesis games and re-released them for all of us to buy! There are usually some obvious differences that distinguish them from the original releases. In my collection, my Majesco SNES games all appear to be Made in Mexico (vs. Made in Japan), have black-and-white manuals, different labels on the back of the carts, and the Majesco name on the box. It's easy to tell that they are made from cheap plastic. In one case, the back label in imprinted into the cart, so really there is no label at all. They also manufactured the Genesis Model 3, and I believe they re-released the Game Gear.
Avoid them! You don't want to buy the Majesco Super Castelvania IV with nice black-and-white manual do you?