Even at level one a pokemon wouldn't get killed by a level four...
so, I'm gonna have to tell you to rewrite that part of your app, okay? Also, 'DJ' would be at around the same level as your father, and unless he has some sort of double-super-effective attack (which, given that Serperior is a mono-typed pokemon isn't possible), he isn't going to kill him. Another option would have been to have DJ killed in a house fire started by your father if you really want the guy dead.