Just because you're a strong enough Pokemon to evolve, don't EVER think the less of those who have yet to evolve themselves. A lack of evolution can easily be by choice, and the most effective predators can easily be those that look the most harmless...
One high-level Charmander has reminded me quite clearly - though much too late - of such caution I should've taken. ^.^;
This was drawn by DragonWalker! Yay!