From: kakashik99992 | #078 Contrary Serperior with Grass Dragon would be a thing to behold it could give blaziken a run for his money as top starter
OU, yes. Uber? No.
I don't think it would be banned but it would be able to be almost as succesfull serperior has 113 Spe enough to outrun even Latios along with most of his threats and with a stab Draco Meteor that gives him +2 he would be extremely dangerous all he needs to have "perfect" coverage would be Hidden power fire that at +2 already is enough to kill most of the things that could pose problems and Leaf storm is another great move
Not to mention that using a scarf it could destroy most of the commons scarfers of the game today and with specs it could put a dent in pretty much anything.
Not as good as Blaze but gives him a run for his money for sure
My pokemon run http://thepunchlineismachismo.com/archives/150