Just finished beating the elite 4, this hack was super fun - waaay better than the usual games. Actually a challenge at times, though sadly the AI is still pretty easy to abuse.
I played the 679 build and primarily used Togekiss, Blissey, and Slowbro (Mega). All obtainable early on, with two of them using Yawn which the AI doesn't switch out from made it too easy overall. After the 7th gym badge with Slowbro gaining calm mind, there was no real challenge anymore. I imagine there might have been a couple taunt users, but slowbro had Oblivious anyway pre-mega. I admit I relied on a bit of luck before that with Blissey with +6 evasion from 3 minimizes, but boosting stats was clearly the easiest way to destroy the opponents. My +speed Togekiss could yawn something, then I swap to a sweeper and that's game. There were a few opponents that would toxic me or whatever, but I wasn't limiting myself against using in battle items.
If you're strapped for cash/exp early on, you can pretty easily chain a bunch of happiny's in route 1 to find some lucky eggs if playing 679. I found 9 lucky eggs in an hour trying this out.
Bug fix: For some reason pressing on the map during Star Sapphire (bottom screen as part of the pokenav) crashes my 3ds. Also, sometimes rematches with trainers will display an empty text box - whatever they're supposed to say is missing.
I'll be playing the post-game stuff through now, and I'll definitely try out your Sun Moon hack. I might replay star sapphire again with some sort of challenges to make it harder. Stat boosts and item use trivializes it too much.
Great job with the game hack! Thanks so much for doing it.