Wolfwoods Shop: This is where all the members of the rpg start. You can buy nearly anything you want here and the owner can give you detailed descriptions of most items.
Evolving Plains: This is the basic training area for the rpg. A great place for begginers to find weak monsters to fight, and also a good place for experts to find a challenging monster. This place pretty much has everything you'll need to level up.
The Temple Of Time: There are no monsters here at all, and as far as anyone knows there is nothing special here. However, the temple holds an ancient secret, waiting to be discovered.
Fire Mountain: Fire Mountain is a good place to find monsters and pokemon. The monsters here are a bit stronger than the monsters in the evolving plains though, so if you come here, be careful.
Sunnydale: This place is the home of tons of undead monsters. It is also the best place to find legendary Demon Slayer weapons though. So far only two of those weapons have been uncovered.