Quagsire set that's proven to be the quite useful in Ubers.
http://www.smogon.com/dp/pokemon/quagsire
[SET]
name: Uber Support
move 1: Yawn
move 2: Encore
move 3: Ice Punch / Brick Break
move 4: Toxic
item: Leftovers
nature: Careful
ability: Water Absorb
evs: 252 HP / 252 SpD / 4 Def
[SET COMMENTS]
<p>Thanks to its fantastic typing in conjunction with Water Absorb, Quagsire makes up for its lacklustre base stats and can function as a solid support pokemon in Ubers.</p>
<p>The immediate and obvious niche Quagsire fills is as a counter to most, if not all, variants of the seemingly omnipresent Kyogre. With an immunity to Electric and Water-type attacks, Quagsire only fears the paltry power of a non-STAB Ice Beam. Specs variants can only offer a 3HKO, even with Stealth Rock on the field. Meanwhile, an unboosted Ice Beam will only threaten a 5HKO. Similiarly this can also serve as a decent check against Palkia and Manaphy (lacking Grass Knot).</p>
<p>Encore prevents several Ubers who would otherwise laugh at Quagsire's pitiful attacking power, such as Tail Glow Manaphy and Bulk Up Dialga; two set-up sweepers could also care less about status effects. Toxic is a superb options against other walls such as Lugia, Groudon and Latias, while Yawn can help in forcing switches. The choice between Ice Punch and Brick Break depends more on utility, rather than sheer stopping power. Ice Punch is a good check (and a 2HKO) against Garchomp and Rayquaza, while Brick Break can shatter Reflect and Light Screen.</p>
<p>It should be noted that Quagsire should not be handled as a wall or tank; instead its immunities should be used to force switches or force opponent's into selecting particular moves. For example, Kyogre's will be forced into Ice Beam in order to actually dent Quagsire, allowing you to bring in bulky Tyranitar or Metagross and wear it down with Pursuit. As almost ever Uber team carries a Kyogre, Quagsire will have ample time to switch in, while Toxic and Yawn will make several Ubers think carefully before attempting to switch in.</p>
http://www.smogon.com/dp/pokemon/quagsire
[SET]
name: Uber Support
move 1: Yawn
move 2: Encore
move 3: Ice Punch / Brick Break
move 4: Toxic
item: Leftovers
nature: Careful
ability: Water Absorb
evs: 252 HP / 252 SpD / 4 Def
[SET COMMENTS]
<p>Thanks to its fantastic typing in conjunction with Water Absorb, Quagsire makes up for its lacklustre base stats and can function as a solid support pokemon in Ubers.</p>
<p>The immediate and obvious niche Quagsire fills is as a counter to most, if not all, variants of the seemingly omnipresent Kyogre. With an immunity to Electric and Water-type attacks, Quagsire only fears the paltry power of a non-STAB Ice Beam. Specs variants can only offer a 3HKO, even with Stealth Rock on the field. Meanwhile, an unboosted Ice Beam will only threaten a 5HKO. Similiarly this can also serve as a decent check against Palkia and Manaphy (lacking Grass Knot).</p>
<p>Encore prevents several Ubers who would otherwise laugh at Quagsire's pitiful attacking power, such as Tail Glow Manaphy and Bulk Up Dialga; two set-up sweepers could also care less about status effects. Toxic is a superb options against other walls such as Lugia, Groudon and Latias, while Yawn can help in forcing switches. The choice between Ice Punch and Brick Break depends more on utility, rather than sheer stopping power. Ice Punch is a good check (and a 2HKO) against Garchomp and Rayquaza, while Brick Break can shatter Reflect and Light Screen.</p>
<p>It should be noted that Quagsire should not be handled as a wall or tank; instead its immunities should be used to force switches or force opponent's into selecting particular moves. For example, Kyogre's will be forced into Ice Beam in order to actually dent Quagsire, allowing you to bring in bulky Tyranitar or Metagross and wear it down with Pursuit. As almost ever Uber team carries a Kyogre, Quagsire will have ample time to switch in, while Toxic and Yawn will make several Ubers think carefully before attempting to switch in.</p>