|Soul Calibur 2 I believe has sold more copies on the GC than it has on other consoles.
Not really surprising since on the other 2 consoles games like SC2 get lost in the shuffle, while the GC, IMHO, doesn't have too many third-party games of Soul Calibur's caliber.
Somebody else touched on this before I could, but I think Nintendo's stance on online gaming will hurt them in the long run. Online gaming is the future whether you like it or not and if the big N doesn't jump in soon, they're gonna miss the boat. Personally, ever since getting Xbox Live, I don't even CONSIDER getting a game with no online play UNLESS it's really exceptional.
But like dschroll said
|Nintendo seems to focus mostly on gaming in Japan rather than gaming in the US
Since they know where their bread is buttered, don't think they give a damn whether you buy a GC or not. To them, Japan is the turkey and we're just the gravy.