Venusaur (Mega)

In the sixth generation, we were introduced to the concept of "mega" evolutions, souped-up forms even fully evolved pokemon can adopt during battle. Mega Venusaur is one of the most conservative of these additions, adding so little to Venusaur's design that it almost doesn't appear to have changed at all, except for the pink flower on its head, which is adorable for such an otherwise beastly creature.

Overall, it's interesting that this evolutionary line, the very first in the pokedex, is part poison. Nobody really thinks about their toxic aspect, and I suppose that's because it really isn't part of their theme. The first generation really liked to toss poison around willy-nilly, though it also sort of treated poison as the "bad guy" typing for mean, scary pokemon. Was Venusaur supposed to be the most "villainous" of the three starters?