Mario Kart
From The Big Bang Theory Wiki
One of the most popular games for the various Nintendo gaming systems. It's a driving game where players compete around fantasy racecourses in various racing vehicles piloted by characters from the Mario franchise.
Sheldon and Raj play Mario Kart Wii, Sheldon playing Mario and Raj playing Yoshi. Raj wins handily ("Eat my dust, racially stereotypical plumber!"), since, as he states: "Face it, dude, whether it's a real car or a virtual cartoon car, you can't drive ..."
