>>5721046>you can just find art that groups them together and check the tags from there. I don't think I can search tags to only see species of Pokémon specifically, so I'd have to just go through the list of every single species tag on e621 and pick out the Pokémon manually.There are images that at least have every gen 1-8 mon tagged together, not counting gimmicks like regional forms or mega evolutions.
You can also the last update from this thread, but it’s outdated for 2025
(furrywebsite)(.)net/forum_topics/33499