Successful franchise games = easy $$$$$. But to Nintendo's credit, they don't make quick, cheap knockoffs of their top name brands. Mario Galaxy is pretty acclaimed. Mario Kart, on the other hand, is something you'll either love or hate because while it is a tried and true series, the computer opponents cheat like there's no tomorrow and it's easy for drivers in the back of the pack to "rubber band" to the front because they want anyone to be able to pick up and play it without needing to be an expert.