>>26813228Finally finished! Left is the regular region, right is post-game.
The plot would revolve around the legend of the region's creation. It is said that a massive pokemon literally pushed together a bunch of continents using its massive strength in order to create it. Some say that the large variety of biomes in the region is a result of these different slabs of land being mashed together, and there's various gorges and deep canyon rivers which some theorize to be the places where the different parts fit together.
Atlas Corp. is a large company who discovered massive amounts of primal energy underneath the region. They gained notoriety for turning this into an renewable energy source for the region. However, through the plot you find out their CEO is actually using this to look for the legendary pokemon, which they believe is the cause of all this primal energy and is resting somewhere beneath the region. They wish to use it to basically rip apart the region and rearrange everything to create a new region that is perfect in every way to suit their needs.
Of course you stop them and catch the legendary at the end, but its awakening shook the region. In the post-game, some routes got rekt and are now rearranged. Some walls have now crumbled, revealing new pathways behind them. Some holes in the ground have appeared, opening up entirely new cave systems. So now you can pretty much re-explore the entire region and find a lot of new stuff, including new rare pokemon who are starting to emerge.
I once made a pokedex for it using real pokemon (the legendary being Regigigas), but I'm currently making a fakedex which is a VERY slow process.