Dark Cloud Fifth Boss: Minotaur Joe
This boss is so stupidly easy. Like, easiest boss in the game by a mile. All you have to do is run around the arena and avoid him until he goes to drink some booze from a keg. If you let him drink he'll gain the stamina buff and do some serious damage so you'll want to try and avoid letting him finish his drink if you can.
The strategy you're supposed to use for this boss is to run around avoiding him until he goes to drink his booze. When he does this you'll want to run up to him and hit him to stop him and also this is when you will primarily do damage to him. That's all there is to it and if you do it right he won't even hit you a single time.