>>27895685It took a while, but I finally got to the end of this. I lost good mons on the way including my boy Guzma and my earliest bro Rawk Hawk in the final battle.
There's another region in the game but you're locked off from using your old Pokemon in it, so I'm going to save that for another time.
Now I feel like starting up a run of Sinking Sapphire.