[barry4ever]

Originally Posted by Fat Farewell

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[Kyogre @ Choice Scarf Timid, Water Spout / Ice beam / Thunder / Hydro Pump + Wobbufett @ Leftovers Calm, Counter / Mirror Coat / Encore / Safeguard + Poliwrath @ Leftovers and Adamant, Encore / Belly Drum / Waterfall / Brick Break]
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[Wobbufett Type Combination]

[With Kyogre, Swift Swim Poliwrath becomes effective, plus Scarf Kyogre can be used to check Groudon and Rayquaza with Hydro Pump or Ice Beam, respectively. Wobbufett with Encore works as a free Encore set-up and helps eliminate other Swift Swim or Scarf threats such as Kingdra or Scarf Shaymin-S. With Wobbufett and Kyogre removing the faster or weather negating checks, Poliwrath is able to safely come in and Belly Drum opponents so its STAB backed by Rain can sweep through an opposing team causing most of the UBER metagame to fall in 1HKOs. Poliwrath does support its own Encore rather than a third attacking move to ensure that if say Darkrai or a faster Taunt comes in against Wobbufett, Poliwrath's Encore can effectively outpace and trap the foe into a free switch or in Poliwrath's case, a free belly Drum. Don't worry about Stealth Rocks, Leftovers and Poliwrath's typing negate that damage after 1 turn being switched in, allowing for Poliwrath to always be able to Belly Drum at least twice.]

[This combination can be stopped by Faster foes such as Scarf Shaymin-S, or Pokemon with weather abilities like Kingdra, Groudon, or Rayquaza, but for the most part the only other Pokemon that can withstand a 1HKO from Poliwrath's STABs once Belly Drum has been used are defensive foes such as Shedinja, Giratina/O, and sometimes max HP/Def Lugia. Keeping in mind priority from the likes of Rayquaza and Arceus can damage Poliwrath, one must remember that Leftovers are used to secure survival after Belly Drum.]

[To fix these problems, one might also include entry hazard support. Stealth Rocks alone eliminate Shedinja, and Lugia's chances of surviving a Rain Belly Drum boosted Waterfall are completely negated. Toxic Spikes from the likes of Forretress can also help to wear down Giratina and Groudon.]

Adamant Poliwrath peaks at 478 Speed, which isn't even enough to outspeed Scarf Palkia. Defensive Kyogre is also a Pokemon that Poliwrath can't OHKO at +6, which is pretty pathetic, actually.

Something Shrang posted in non ubers thread. It exactly states why poliwrath is a rather iffy sweeper.