I've been told the answer to this is no but just wanted to ask anyway since I can't find a definite answer on the site...can a Groudon/Kyogre NOT caught in ORAS go primal (so for example, a groudon caught in the original ruby or soul silver)? And same thing with Rayquaza and mega-evolving, can a non-ORAS one learn Dragon Ascent (don't go into too much detail about the Delta Episode if possible please lol)?
Hope they can do it, I did transfer my shiny Kyogre/Groudon/Rayquaza from HG/SS to the Pokebank hoping to see their shiny primal forms.