Okay, so I'm in Heaven's Mirror Forest, and I cannot defeat that hog(I guess you could call it that)! Is there anything I can do to help defeat it?

What level are you?

My only recommendation would be to run around and fight some of the monsters. I believe I was around level 5 at that stage, and I didn't have many problems.

Make sure to make use of Orange Glow and Sacred Signature to heal your party.

I guessing his rushing attack is what gets you (That's his worst at least.) The best thing you can do is surround him. He can hit you longer, but he can't use his rushing attack, which will hurt you the most. Of course, blocking all attacks is vital as well. But keep everyone healed (with Polka, since Frederic is the strongest at that time)
and you should be able to defeat him.

just like she said go around killin things a lvl 2 a sertan lvl i was lvl 7 when i beat that thing up and i kept on using sacred signature on frederic an atacking ith polka u can do it the oher way around but once i deafeted that hog i was at just about ull heath on each character do if u do whatr i did u will pobly have no pronblams man