The Alola Region is the first ever region in the World of Pokemon that has literally been subdivided into four separate places. Sure, Kanto and many other regions received a few islands off the Coast of their region, but never has one been divided into separate entities that make up the whole. And from one island to the New, there are different Wild Pokemon to be found, cities to be explored, Trial Captains to take on, and Kahunas to Battle in your Grand Trial.