the bosses are trouble some but it all depends on your level. you would kill the first boss easily but you head over to the coliseum( the most logical place for boss rematches) and the first boss is as hard as the last boss. if this is inputted into the game I would expect a difficulty level because it would be no fun if you are level 100 and maxed out and the final boss who gave you so much trouble dies in one combo.