I have some boxed games, and they are in those plastic protectors, but I like the uniformity of the rental cases... Mind you, Genesis games are the worst. Half the official games are Red stripe, the other half are that black SMS like case. Then you have the Third party EA, Accolade, Codemasters cases. It drives me nuts, but the official cases were basically rental cases anyway.
I managed to find the Rise of the Tomb Raider CE guide today and I picked up Driver Parallel lines for Wii and Naughty Bear Gold Edition which has the code for Trouble in Paradise... which hopefully works.