I reckon I've played as much of this hack as I'm going to, so I'd like to leave a review.
I have to echo BigBogMonster's praise of the design of the world. There is so much character here, from the very beginning when you leave your coastal town and travel along a cliffside route to the first city, being given the choice of facing a gatekeeper on the direct path or exploring around the back, stumbling across a lively park in the process. The dense, spooky forest located right next to a rainy route, the mountains that you only see glimpses of as you weave your way around them, the verdant date spot with all those double battles you fight... it feels like a living, breathing, cohesive world. Maybe there didn't need to be that many open desert areas, but I'll take a world that immerses me over a world that feels like it's checking off a checklist of biomes every time. I thought this aspect of the game was spectacular (for the most part, but I'll get to that).
I wasn't really invested in the plot, and not many of the returning characters really fit the image I had of them. I did like the ambiguity of whether returning villains had reformed, though.
The game was pretty hard, but to be fair, I have to expect some jank when I come into romhacks. I appreciated the option to bypass the second gym, because without being able to stall it out with Leech Seed, burn and switching, I probably would have taken that. The early game wasn't impossible for me, and I certainly felt more in control once I found a few Evo Stones. Speaking of which, I liked the item density in this game - there was plenty to find if I looked around, with multiple of the same TM scattered throughout if I wanted to teach Scald to two of my Pokémon or something.
Where this game fell flat for me was the final third of the game. The level curve was all over the place, which I think is because the creator changed their mind on when you got Surf and forgot to adjust levels accordingly. Then when it came to the endgame stretch, the water routes were very dull with none of the inspiration of previous land areas, and it just became a slog of a never-ending trainer gauntlet. Team compositions either got predictable (3 legendary dogs + 3 pseudo-legendaries) or ridiculously overpowered. The tower and the reused Victory Road didn't help matters, since I had nothing to distract me from the battles, which seemed to drag on and on. I was at least happy that my Demon Aerodactyl learned its sweet Demon-type move at Lv. 60 during the Elite Four... until I discovered that it was a 2-turn 125 power move with no semi-invunerability, and therefore my frail Aerodactyl generally just died to better Demon moves before I could use it. I did get to the Champion, but a 1000 BST Pokémon with a 180 power, 100% flinch move holding a Lum Berry that's more than 10 levels higher than my team? On a team with a number of insane Demon Pokémon and/or legendaries? I just lost interest at that point.
So yeah, a real mixed bag, this one. I had a lot of fun for a long time, but I feel the final third of the game wasn't treated with the same care that I'd seen earlier on. Overall, I'm glad I gave it a go. Don't use Demon Aerodactyl!