Read the interview. The interviewer asks "Why aren't you releasing any core games?" her response is that they are, and cites Mario Galaxy, Smash Bros., Mario Kart, and says the sales figures indicate that hardcore gamers are buying and playing those games, and that if three games a year isn't enough for you, well, you must really love Nintendo. And yes, that is a good situation for them, because it means anything they do release along those lines will be an instant success. Se also points to ExciteBots and Punch Out as being in the same vein.