Recently I decided to play Crystal again. I've had rematch with every trainer - except four: Blackbelt Kenji, Pokefan Beverly, Juggler Irwin, Pokefan Derek.
Is it possible to rebattle them? It should be - I even found their rematch teams (i.e. Kenji: http://szort.pl/xdgop
Yet, I don't know anyone who successfully did it. Everybody tells me that you can't rebattle them. But their team are listed there.
Are there any special requirements I should met before they call me for battle?
I've tried the trick with changing DST but they tell me the same thing over and over again.