"Pokemon Sword and Shield is getting a $29.99 / £26.99 Expansion Pass (no Australian price available at time of writing) this year, featuring two new adventures - and it'll bring back more than 200 of the past games' Pokemon missing from the new Pokedex."

https://www.ign.com/articles/2020/01/09/pokemon-sword-and-shield-expansion-pass-dlc-announced

Well, there goes my faith in Gamefreak. Yeah; you can get them from Pokemon Home or trading from people who have the DLC, but it's still paid DLC/expansions to unlock another 200 pokemon. "We can't implement the models" and "we're doing this for balancing" my ass.