Can't Defeat Her?
If you can't defeat her what I did was go to where there are lots of machop, get a starly, evolve it (lvl. 14 or 16 can't remember) use flying attacks, ko the purugly, DEFEAT!! It works cos I did it first time with my newly evolved Staravia! P.S. I have 8 badges on pearl and 8 on black and on pearl I defeated Aaron of the Elite 4 so I'm Experieced.