Obviously, some characters weigh more than others (e.g. Bowser weighs more than Toad), which gives them different characteristics such as acceleration, and being able to spin other players by running into them.
My question is if there are weight classes or if each character has a different weight. So for example, the three heaviest characters are Bowser, Donkey Kong and Wario, are they all the same weight or do they have different weights? If they do have different weights, does that mean that for example, you could take the heaviest one of them and run into the least heavy one and that will cause you to knock out (or at least shove) the less heavier player?