This is conservative estimate to say the least since it doesn't include individually sold wheels. According to VGChartz sales numbers (the only that I use ), the combination of Mario Kart Wii's 20.19 million and and ExciteBots: Trick Racing's 0.11 million would put it at 20.30 million sold. I do understand that ExciteBots: Trick Racing did not pack a Wii Wheel in every game sold, but it also didn't sell that many games. This brings me to the reason for Mario Kart Wii's sales...
..the Wii Wheel itself, of course.
It is well known that the Wii Wheel pushed and continues to push the sales of Mario Kart Wii. There are three Wii Wheels on the front of the game's box. Look if you don't believe me. Sales certainly aren't because of the gameplay. Several people have already played the demo of Mod Nation: Extreme Trick Kart Racers (or whatever it's called) and have assured me that the gameplay is several times better than Mario Kart Wii. Unfortunately, the casual gaming community doesn't know what's good for them and will pass on the game that's sure to get a much higher average score according to Metacritic (I base my life on Metacritic scores, by the way). Back to Mario Kart's gameplay; the constant bombardment of blue shells kept me and most other normal humans from getting first place in 150cc. Anyone that has a three star ranking in that game put in the cheat code where you draw three stars with the Wii Remote as you would if you were using the celestial brush in Okami. Plainly put; the game does not involve skill and has a randomly generated winner.
So why hasn't ExciteBots sold better, you ask? Simple. When people decide to buy the Wii Wheel, they pick the game that's packed in with Mario's face. It's familiar and they don't know what an ExciteBot is. Also after trying the Wii Wheel out on Mario Kart Wii, they realize what a useless piece of plastic it is. All that it does is cause the pinky and ring fingers on your right hand to cramp up. After being fooled once and buying the Wii Wheel with Mario Kart Wii, people are not foolish enough to buy another wheel with yet another game that's inferior to Mod Nation packed in. Furthermore, the wheel ripped off Ubisoft's wheel that was packed in with their Wii racing games, but that's another thread altogether.
So why is the Wii Wheel a big draw initially? I believe that it's because casuals find the idea of using a piece of plastic that looks like a wheel more fun than driving with an analog stick. Mario Kart allows you to use either and I started using the stick since I find winning more fun than using the wheel. What this in turn did was leave me with a piece of plastic that is good for nothing. The hole in the bottom of the thing doesn't even allow for it to even be a good container for nacho cheese and salsa.
Which brings me to my next point...
What good is it for? Plastic can have several uses such as being used for food containers, cups, eating utensils, CD and cassette boxes, computer keyboards, drainage pipes, drink bottles, toothbrush bristles, fishing line, eyeglasses, grocery bags, and automobiles. Nintendo uses plastic on meaningless devices like the Wii Wheel and the Zapper. Nintendo should use all of that plastic on throwing the world's biggest Tupperware party in order to make their newly found female market happy. Why not?
I say that everyone that has bought a Wii Wheel or a Zapper meet out in front of Nintendo's headquarters with said devices and melt them down in the world's biggest bonfire. Then with that melted down plastic we could create the world's biggest Wii Wheel and place it on their front lawn. Maybe they can find a use for it.
Congratulations Nintendo on the 20 million sold!!!
Proud member of the SONIC SUPPORT SQUAD
Tag "Sorry man. Someone pissed in my Wheaties."
"There are like ten games a year that sell over a million units." High Voltage CEO - Eric Nofsinger