Evolution has been a staple of Pokémon since the franchise’s beginnings. From raising your little Charmander into a Charizard to using a team of all different Eeveelutions, evolving Pokémon goes hand-in-hand with the series’ other gameplay pillars, like catching wild Pokémon and battling trainers. Because of that, you’d think every Pokémon would belong to an evolution line, but plenty don’t.