Wow, that is pretty fearsome. Overspecialized, perhaps, but dangerous. In all seriousness, Agility, + Download Boost + Life Orb is pretty assuming. Of course if you get +1 special attack and +2 speed, you'll do some damage.
Anyways, I strongly believe if UU can't handle Porygon2, Ninetales and Clefable should be out too.
Ninetales can 2HKO anything in UU after a Nasty Plot. If it switches in on a fire attack (hey, P2 got his boost!) it can probably OHKO most of it. There is no real "counter" to Ninetales, because all the fire resists have a good chance of being smacked down by the second attack. Or, it could forgoe Hypnosis and have three atttacks. Base 100 speed + Nasty Plot + 80 Satk is just evil. 
Clefable can run a huge pile of sets with it's disgustingly huge movepool. No fighting types can switch into it, because it might be using a physical Double Edge set, or it might have Psychic, or Thunderwave. Calm Mind and Softboiled ruin all chances of special attacks denting it, and it's awesome ability makes it immune to status and Life Orb recoil.