I think that the greastest boss of all time has to be Bowser because he is just such a good sport because in every Mario game he eventually gets beaten up, but yet he keeps coimng back for more, just so a new Mario game can be released. I think that Bowser is the best boss ever and he's really cool too.
Yes I agree with Nick. Bowser was the best evil person/boss in all of the games made. I always wished that you could have been him instead of Mario in all the Mario games. I mostly use Bowser when I play SSBB.