If you have problem with "slow battles" or you trying to find out, how to lock frame rate at 30 frames (It was removed in Anniversary Edition for some reason).

I found only one method to fix it:

1) Go to the folder : "Your Disc":\Steam\steamapps\common\Grandia II Anniversary Edition\data\saves
2)Find and open file "config.ini" as text
3) Copy next line from this guide:

run_battles_at_max_fps = OFF

4) Paste it to the end of document
5) Save document
6) Like this guide

You are welcome!