Sadly you still cannot go back to the original regions. However, you are able to visit the Distortion world now.
in the sinnoh reigon chatot in the national exeggcute
the swarm Pokemon are Pokemon from a different reigon who come and swarm a certain place. for example, skitty aren't usually found near sunnyshore city, unless they are swarming that day. hope this helped!:D
i have one i got it from the kanto reigon on platinum and a charizard
if you mean in pokemon then whatever pokemon game was your first that games reigon is your reigon like my first game was pokemon white so im from Unova
No
There are different forms of Pokemon and certain Pokemon you get to battle is at different times.
Latias is from the Hoenn reigon.
no,there is no other reigon in pokemon black and white.
There is only 493 different kinds of pokemon.
No, you can't. Codejunkies has to create different cheats every game. If you want to get Pokemon on Platinum, then use the Platinum version of Pokesav.
You start out in the Johto Reigon.
you get an exacute in the hoho and the kanto reigon