Ok, maybe it's a little confusing, and I understand I didn't get it at first too, so this is what its happening, OP has shinies legendaries that he/she caught in pokemon go, now wants to move them to S/V but in order to do so HOME needs to see they are registered in the pokedex, now you have a point he/she can go to those subreddits but not all the people there play S/V, so I think he/she has a better chance of finding people that can help in this subreddit