S.Peelman on 20 May 2015
MK8 has like a million more sales than on VGC and hasn't stopped selling (I wouldn't be surprised if it reaches 10m). I'd say it at least has a predictable drop considering install base.
Wii Sports Club is probably it, though it's an unfair comparison, as the main volume of it's sales is the individual passes for each sport. We don't know how well that goes. Otherwise it's probably Wii Fit.
