Drillbur/Excadrill can easily sweep Unova story except the 3rd gym might give you some trouble because its pokemon outspeeds drillbur. The moveset is Earthquake/Iron Head/ Rock Slide/ Swords Dance. Earthquake is usually enough to kill any pokemon if your drillbur is +atk nature. If you add a lifeorb when it evolves into excadrill it OHKOs about everything.