Swalot exists as a Muk rehash because they went off the rails with Gen 3, didn't make it backwards compatible, and decided to replace a bunch of old school Pokémon just for the fuck of it. I do appreciate there being another snake Pokémon, I understand that it was the franchise's first migration to a new system and the wanted to change things up. Gen 3 almost killed the franchise for me. Some of the Pokémon have grown on me, but QoL and new hardware changes were pretty much all that RS had going for them.