I did some testing to see if other Pokémon can be transferred. And gen 3 pokemon you can’t with the exception of the event deoxys and some of the gen 2 pokemon. Not even hatched ones like my duskull.
Can anyone confirm if the new home update registers Pokemon obtained with the Ace method in the Dex Completion? I’ve hesitated buying FrLg because I’m a completionist but I have no friends to local trade with and don’t want to shell out money for both games. Also with R/S/E coming out next year I would run into the same issue, I’d prefer getting the Home Completion with ACE method if I can