UNITY'S PROFILE

There's no sort of formula (that I've ever found, anyway) for making good boss stats. It's trial and error more than anything. If you're having trouble getting started, then use the stats of a monster in the general area where the boss is found, and boost all of its stats, with a significant boost to HP. Then play against the boss. If it's too easy, you've got the stats too low, and if it's too hard, you've got the stats too high.

I know that's a really simple suggestion, but I find it can be a good starting point. As you are testing, think about how difficult other bosses are in RPGs you've played and try to match it. Also think about giving bosses a more diversified skill-set than regular monsters, perhaps giving them more of a pattern to their actions. (The monster in your example will probably be pretty boring to fight if he only has two skills that happen completely randomly, for example.)

Very hard, but very rewarding ^_^

I can't wait ^_^

^ Wow, beautiful! Love the early Phantasy Stars (4 and before). Is this for a new game? :D

I'm not on staff but A) I've heard other people talk about doing this on this site and B) if you're remaking your own game, I don't see why it would be a problem. Something might be a problem if you were remaking someone else's game, I'm guessing.