User blog comment:Coveredwarsyouknow/Dead Rising 2 -- What makes a Psychopath?/@comment-27159736-20150728180405/@comment-27159736-20150805165315

grenades don't do that much damage against psychopaths since they can just get away from them even then it doesn't do that much damage to them. I am not that sure on what level unlocks the dodge roll but theres bound to be a page on the wikia on the move sets.