I thought she was actually easy compared to what I had read here. Here's how my first and only battle went:
Whitney sends out clefairy.
Cyan (female quilava lv 20-something) used flamewheel and took it down to like 1 or 2 HP (I thought it had fainted, but alas, no).
Clefairy used Mimic (HeHe too bad you won't have chance use use this new move).
Whitney use super potion which healed Clefairy almost all the way up.
Lucky me, I thought she would do that and I had Cyan use flamewheel again.
Clefairy fainted. (me: yes!!)
Then Whitney sends out Miltank and I leave in Cyan (me: this should be fun).
Whitney comes on and says she still has 1 pokemon left, but I don't really care; I want to battle.
Cyan uses flamewheel (puts Miltank in yellow?).
Miltank uses stomp (me: please don't flinch, aw...Cyan flinched).
Miltank uses Milkdrink
Cyan uses flamewheel again which makes Miltank faint.
me: Yes, yes, yes, that wasn't too bad!
Of course Whitney crying really freaked me out, where was my badge? (But then, I figured it out, I would have started to cry if I didn't get my badge.):laugh: