will you make different races for the different areas you could also make variants of the races now for the different areas like the desert and another question will the volcano in the discants be eventually accessible?
Each biome will have at least 9 unique species. Other regional mons will wonder over to other areas sometimes. There will be unique varients of existing mons in different biomes too. Like a fat bunny in the snow region.
Yes you will eventually be able to access the volcano and inside of it.