What the heck is with the body? If you pit him against another Psychic class, he'll be almost invulnerable, unless the attack only has 10 base damage (highly unlikely)... Same goes for any mid to high range cards.
Still, this is the card to use in late game, after all your opponent's basics evolved, they'll have no way of damaging this thing!
But, it's body won't protect him against any damage counter attacks like Dusclops ex's Shadow Beam, because they don't technically do any damage (counters != damage), but those attacks are relatively rare. About Special Conditions, the effect is only nulled AFTER a SC is inflicted, so if you keep a few Full Heals or Scoop Ups ready, they won't be a problem.
The attack's damage is cumulative, like Fury Cutter in the games, so as long as he stays in, it'll do more and more damage, so the base damage isn't a problem at all.
8.5/10 - just don't take him out too early, then he'll be almost invulnerable.