I'd recommend removing Corv and Tusk in favor of Iron Treads. Your team doesn't need Rapid Spin, Defog, and a Hatterene, it's not that bad against hazards. I'd recommend going physically defensive Mandibuzz as well, if you're going to use Foul Play. Whatever pokemon you add needs to be good into Kingambit. I'd also reconsider this Hatterene set, and potentially Porygon-2 as a whole. Is this set working?