I know it isn't the most accurate, but New Super Mario Bros U on Wii U had 5.6 Million units in lifetime sales. Mario Wonder is at 4.3M two weeks in. I think Wonder is going to match NSMBU around Thanksgiving day.
Just crazy to think about the shift in the decade between these two releases.
That's a great point. SMWonder is putting out huge numbers compared to the equally amazing NSMBU. But console sales may be a factor. DS sales for the first weeks of NSBM was high but not 132M high.
DS got there eventually (including DS Lite in those sales even though the overwhelming majority are from DS Lite) but didn't have the user base SMWonder had at launch.