>>33546426I have one too. It's definitely time-intensive, but not too hard to do if you have the persistence. I personally started by completing the Pokénav in ORAS. From there I played through XY to get the pokes you couldn't get in ORAS, and I used my multiple copies of gen 6 games to collect 20th anniversary event mons that I could trade for the mythicals I was still missing.
Probably took me half a year in total, but I wasn't busy with it everyday or anything. The most boring part is having to grind the elite 4 with a high leveled poke and 5 baby mons just to evolve them all as quickly as possible.
