Personally, I don't like it at all.
120 HP is the best thing about it. At least it makes it see possibly 1 more turn of the game than a normal Claydol.
It's Poké-Power isn't too bad as there are a few main decks in the format with weakness to Fighting that no one (other than RaiEggs players) are capitalising on. It does, however make it vunrable to Cursed Stones/Zzapps/etc.
Psychic Boom wants your opponent to attach loads of energies to their active. Unless they are the worst player in your metagame, I doubt they would do that. That means you will be doing roughly 30-50 damage per turn (before weakness and resistence). For a Stage one Ex, that isn't actually that good.
Shadow Crush is a nice way of annoying your Special Energy card playing opponent, but otherwise will do nothing to hurt them. Plus, you will need an energy accerelarator to do the effect every turn, which often come with annoying side effects, like getting it KO'ed quicker, or play Power Tree, limiting the energies you can play.
Psychic weakness is like telling all of the major decks in the format that you want to lose. Flygon Ex (Df), Banette Ex (Lm), Metagross (Dx), Mew Ex (Lm), Slowking (Uf), along with others, are all Psychic types that can OHKO it, plus there are more...
To top it off, a 2 retreat cost. About average, so slightly improves the card, but still not great.