S.Peelman on 18 October 2014
Smash 3DS: 5.2m
Smash WiiU:2.6m
So yeah, that's half of the 3DS version. The 3DS version here has the advantage of a couple months and will have a bigger start because of the user base difference. I do still believe however, that when all is said and done, the WiiU version will beat the 3DS version in lifetime-sales. At least statistically tie it. A bonus prediction: Mario Kart 8's sales are going to double this holiday 
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