I think the best car of all of them is the Dry Bomber. Why? It has got the best accerleration, meaning you can go over mud and stuff an still carry on at nearly the same speed. The only plave which can really slow down that Kart in my experience is the sand in the desert. Also, you get hit by an item (which is not a bomb, bolt, or a blue flying spiny), you do not actually stop. You are able to resume driving before the item actually stops you, so all it does is slows you down a bit. Also, the Dry Bomber can turbo boost the best of all Karts imo. A turbo boost from a Dry Bomber is almost as good as a signle mushroom boost.