Top 6 Best and Worst Single Stage Pokémon

Evolution is a cornerstone of the Pokémon franchise, however not all Pokémon share in this and some of them remain unchanged their entire lives. Some of these non-evolving Pokémon are great; however others are a bit of a let down (which is a huge understatement) so which ones of these standalone creatures are the best or worst of the lot? Let's find out!