4. Mario Kart Wii (36.38 million)
And Mario Kart Wii, which debuted in 2008, was definitely a strong entry in the series. With kiddie-friendly characters like Mario and Luigi and cute and colourful vehicles it was a racing game that offered plenty of fun, both offline and online. And going up against human opponents using the game’s bundled steering wheel peripheral sure was a fantastic racing experience. So it is no surprise that Mario Kart Wii is the best-selling Wii game, having shifted an astounding 36.38 million copies.