You know, a really overlooked Ubers pokemon is Shedinja. While it may appear gimmicky (and may BE gimmicky) if you're running a stall-ish team, and have a Forretress to Rapid Spin, you should try out Shedinja. The list of pokemon it walls is by no means short, and walling anything in Ubers is impressive. Mewtwo without Flamethrower, Kyogre, Palkia without Fire Blast, defensive Groudon... the list goes on. The only notable Uber pokemon that almost always carry super-effective moves are: Darkrai, Ho-oh, Giratina-o, and Garchomp. While this sounds like a lot of Pokemon, that means that everything else can't really touch Shedinja. Also, if you're going to have Rapid Spin support anyways, sticking Ho-oh on a team isn't such a bad idea either. However, by doing this you take a big risk because if you can't get rid of Stealth Rock, it's essentially 4 vs 6, since neither Shedinja or Ho-oh will be doing much with Stealth Rock screwing them over. An effectively used Shedinja is quite beastly, and I have lost many a game before due to this annoying little bug. Try it out.