Charmeleon

Middle evolutions like Charmeleon are always so overlooked. Caught in a purgatory between cute, marketable baby and fearsome monstrosity, they tend to enjoy smaller, more niche followings. Charmeleon is pretty much just angry, teenaged Charmander with a weird bone on its head, but a lot of people can probably really relate to that, you know?

Out of the entire line, Charmeleon also boasts the best play on words. It's a shame such an excellent portmanteau couldn't have gone to a monster actually based on a chameleon that breathes fire, though.