Where abouts in the game are you? Are you against that frozen dog?
If so, then you have to constantly hit it with physical attacks until it swaps to full protect or whatever it is that cant be dispelled then you constantly hit it with magic until it swaps again.
Keep using the opposite until it's finally defeated.
I think that's right anyway, i'm not 100% sure as it's been a while since i played the game, as i said before.
Once again, if it's not right then maybe someone else can help you out properly.
Sorry i couldn't help completely.