Sorry, but you are unable to do that in platinuim or dp
Chat with our AI personalities
No you can not. You can only stay in Shinno in Platinum. On Pokemon Heart Gold and Soul Silver you can go to Kanto but not Hoenn and Shinno.
Trade it in from another game.
You can't get to the johto region in firered.
No, Profersor Elm appears in the Johto region.
Its a Pokemon Searcher that finds hoenn or johto Pokemon after you defeat the elite 4 and talk to Prof.Oak.