Hm, Marowak, you say? Well, a STAB Earthquake is a must. You could have Substitute and Swords Dance to set up yourself, or atleast Swords Dance. Stone Edge for getting all those pesky Flying and Ice types out, or Thunder Punch to knock out threats such as Gyarados or other Water Types. Using it's ability, Rock Head, You could get Double-Edge. Or, If you want more defence, you can get Skull Bash. Maximise ATK and DEF. Hope I helped.