Well, let me start off by suggesting Fighting/Rock.
Weaknesses: Psychic, Fighting, Grass, Water, Ground
Resistances: Bug, Dark, Rock, Fire, Normal, Poison
A risky typing, in my opinion, due to is defensive problems, such as the ever common fighting and ground typed attacks. Its physical prowess could boost this pokemon however, as its typing leans towards the physical aspect of attacking.
It could also be used as a risky early-switch in or lead, setting up Stealth Rocks before switching out. To be honest, thee only direction this pokemon could take is a sweeper/glass cannon role, but many/most people were talking about this in the concept discussion.
Also, a physical wall could counter this pokemon easily, which is always a risk.