He'd actually be worth using on sun teams if he didn't require a spinner all for himself. It's like you're using a latios with a higher special attack stat and a base 180 STAB attack with no drawback. Unlike Latios, he doesn't have any counters that aren't 2hko'd or ohko'd.
But unlike latios, you can't casually switch him into stuff he doesn't resist due to mediocre defenses and a crippling weakness to SR. You can't even switch him in to revenge stuff without him losing most of his health most of the time if SR is down. If you're a fantastic pokemon, stealth rock is a minor setback. But if you're only "okay" then the existence of stealth rock is going to take away any chances you had at seeing much play.
Brawl FC - 1332 8069 6690 http://i.imgur.com/OZ9aS.png