Just checked back on this topic, some mixed opinions and interesting thoughts.
I agree that the idea is a little 'out there', but just thought I'd suggest it anyway :p
BTW, I've noticed a lot of comments about karts... I never mentioned karts. That definitely would not work, I agree. What I mentioned was horses, boats, deku leafs, trains, and loftwings.... karts would just be silly and wouldn't fit.
A nintendo kart idea would be cool though yes.