The temperment on a game pit is very bad...it took me along time to brake mine and he still acts up every now and then but he knows that if im around he better listen.
By "bad" do you mean dog aggressive? I have performance bred bulldogs and I would not consider ANY of their temperments "bad." Dog aggression, yes for some of them, but they are what they are. Now if you're speaking of human aggression, any bulldog (APBT) that is a man biter should be culled.