How could a Nintendo gamer be anything but a core gamer? I mean Nintendo games aren't time wasters like Angry Birds. I guess Wii Sports is casual, but I wouldn't consider a soccer mom that plays Wii Sports and Wii Fit a Nintendo gamer. Zelda, Mario, Metroid, Star Fox, Pilot Wings, F-Zero, etc. are all core games and those are the games that Nintendo fans like me buy Nintendo systems for.