What Is The Biggest System Seller of All Time?

[NintendoPie]

crissindahouse said:

something on wii

wii sports, wii fit or mario kart. well, i think wii sports or wii fit and not mario kart even with enormous sales.

Between Wii Fit and Mario Kart which would you pick? Both pushed large amounts of Wii systems. I'd lean towards Mario Kart if it came down to those two, personally.