You can beat her. If you're not strong enough I recommend going back and battle training a lot.
(Fun fact, Moonstar originally had 1000 health)
thx also how much times do I gotta battle train to get 600+ health if you can't answer that I'll just play for as long as I can lol
Not 100% sure, but training with Amberclaw gives more. Also, you don't need to be at 600 health,300 or so should be ok. And you could always save and come back later
thanks!