No way, 100 is supposed to mean, the Maximum it can go, such as 100%. Any higher and it would be a nuissance, aside from the fact that I like going toe to toe with two LV 100 Pokemon and see which can dish it out better.
The only time I see that making any kind of sense, is in the Anime, because I don't see a Pokemon reaching its max potential (which is another reason of why it is only up to level 100), I would think it can get stronger and stronger the more it trained.
In the Video Game world, I see it as much different. There is always an end to things.