Mario Kart Wii is very close to falling out of the top 40 now. As far as I know, it's been in the top 40 for 156 weeks straight, and this week is its worst week yet. As it is right now, it's selling pretty much exactly as much as GT5 in EMEAA.
Next week, we might see Wii Fit Plus and Wii Sports Resort being the only game charting that's been out for more than a year.
I believe it's also the first time that neither of the two Mario DS evergreens (NSMB DS and Mario Kart DS) chart.
In fact, I believe this is the first week since New Super Mario Bros. DS launched that there's only been 1 Mario game in the top 40. Next week, there might be none.