Where do you find the golden fly in breath of fire 2?

You should find him flying around in the basement of SimaFort. To get there, talk to one of the girls in the main garden-like area, who is looking for her boyfriend. Go up to the rooftop (go through the throne room, and through Jean's room. There's an obvious secret area in there) to find a frog drying up there. Then go talk to the girl frog again and tell her where he is. In return, the boyfriend will give you something. It doesn't matter which answer you say, since I'm quite sure you get both anyway. You can use the moving buckets to get down to the basement.