Mons: Going to test all to various degrees.
I think Bastiodon gets a bad rep. It is one of my favourite Pokemon, design wise, so believe me when I say that I was more than a little disappointed to find it that it isn't the competitive behemoth its look suggests.
I've always said that it's trump card over Probopass is Roar. It can set up rocks and roar all day long. It's incredibly infuriating for the opponent to be constantly shuffled when the majority of the time they can only attack for neutral or resist damage before being shuffled out again.