yes after u beat ur rival like 1000 times
No.
Go to other regions and talk to the professors sorry that's all i know
You can't, Platinum is in the Sinoh region and the Sinow region only.
you can go to all the regions. First tou have to beat the battle frontier and find this old man with a ghost Pokemon and then you go home and you will find may.and you will get to battle any were.
No, but you can find Pokemon's from other regions
You never will go to a different region.
I am not certain it is possible to go to other regions in Platinum, but I don't think they are accessible simply because you could do that it in the Emerald version. The only way (in my opinion) to get to the other regions are by using Action Replay cheats.
you can go to all the regions but the bad side is you must beat your rival 2000-2700 to get all of the regionshope this helped!!!
No. You stay in the Sinnoh Region the whole time.
I dont think there is one.
NO
You can't go to different regions in platinum. The only game that lets you do that is Heart gold/Soul Silver... PS For heart gold and soul silver, the regions in it are johto and kanto even though Hoenn region champion Steven is in it. Hope this helped :D You can't in Black/White either =/