The GBC is definitely a new system and not just aredesign. It's got exclusive games, more powerful hardware (faster CPU, more RAM, color screen)... what more do you need to make something a new system? They blocked some games from running on the original GB probably because they make use of the more powerful hardware, not just for the reason you say; dual-mode titles generally have to limit themselves to the original GB hardware only, though of course there are a few cases of dual-mode titles with big differences between the GB and GBC versions on the cart, such as R-Type DX or Conker's Pocket Tales.
And yes, the DSi is a new system as well, very similarly to how the GBC is, but with fewer dual-mode games (games enhanced for the upgraded system that also work on the original).
Also, I think some good efforts at GB/GBC sales breakdowns do exist, even if Nintendo itself has generally merged the two. Both sold very well, but separated neither one hits 100 million, obviously (given the 118 million total), so the Playstation is indeed the best selling "classic" console. I'm not sure which system is second offhand, though -- it well might be the Game Boy, not sure if GB or NES is 2nd. (Probably not GBC, but it's certainly high on the list).
Quite true. The only time the most powerful even kind of won was the SNES, which was the most powerful system that generation if you ignore the Neo-Geo (and 32X, on the basis that it was an addon and released after some next-gen systems).Originally Posted by FoxNtd