No one knows yet it may be based on a region in Japan but Unova was modeled after New York City so it could be modeled after somewhere else in the world
The move deleter is in Blackthorn City in Johto Region. Next to the Pokemon centre
In pallet town next to your house a woman inside will give you the region's map. Or in any Pokemon center next to a PC there should be a town map. Press A on it.
The Fiore region is a region seen in Pokemon Ranger.
You can't get into the hoenn region in Pokemon diamond. It's a 1 region game and that region is SINNOH! BY THE WAY HAVE YOU HEARD OF POKEMON X AND Y
Hoenn Region
You cannot go to diffrient regions in Pokemon Sapphire.
The only region in Pokemon Platinum is Sinnoh (Gen. IV). You can also travel to Reverse World, however it is not considered a region.
Beat the Elite 4
I do know from SERBII.net it is called Isshu Region.
The Kanoa Region
Kanto region north of saffron city. Next to the Pokemon center
There is no known new region name for the Pokemon gen 6. However Game Freak has confirmed that they will be making more pokemon games. Submitted by: MeowMixTiger
The move deleter is in Blackthorn City in Johto Region. Next to the Pokemon centre
It has not been officially announced yet.
On console games you cannot change the region the game is set in with out a Game-shark or Action Replay. But on Pokemon crater if you clear the region ( defeat ) you will unlock the next.
As of December 13, 2013, Ash will be going to the Kalos region next in terms of the U.S. broadcast however in terms of the Japanese airing schedule, he's already in the Kalos region.
Pokemon Emerald takes place in the Hoenn region.