IGN gives Mario Kart Wii 8.5.

[FreeTalkLive]

Rock_on_2008 said:

 

I prefer Super Mario Kart and Mario Kart 64. MK Wii looks a lot better than MK Double Dash. The Gamecube's MK game was the worst Mario kart game ever made.

 I have not played every Mario Kart but I would hope you are correct because DD sucked.  I bought it used to pass the time with my Wii but couldn't stand it.