is the Wii Fit BMI system? Lots of people complained when it was released that it was calling them overweight when they weren't. A little complaint about the other side of the spectrum here - in order to be classed as underweight, you have to be under 17 as far as I can tell. That is a load of bullshit. A lot of doctors would even class 19 as underweight, and I'm less than that.
Nintendo, what kind of a culture are you trying to create?
Also, my Mii looks thinner than I am. Pah.