Poliwrath @ Leftovers  
Ability: Water Absorb  
EVs: 160 HP / 252 SpA / 96 Spe  
Modest Nature  
IVs: 0 Atk  
- Scald  
- Focus Blast  
- Ice Beam  
- Vacuum Wave  

Poliwrath @ Leftovers  
Ability: Water Absorb  
EVs: 252 HP / 4 Atk / 252 Def  
Impish or Relaxed Nature  
- Rest  
- Sleep Talk  
- Scald  
- Circle Throw  

Poliwrath @ Normalium Z  
Ability: Swift Swim  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant or Jolly Nature  
- Belly Drum  
- Waterfall  
- Ice Punch  
- Brick Break

Additional Moves: Substitute, Focus Punch, Hydro Pump, Encore, Toxic, Protect
Additional Items: Fightinium Z, Choice Specs
-For Poliwrath's first set, 96 Speed EVs are used to outspeed neutral base 50's such as Regice and Mawile. A faster spread of 96 HP / 252 SpA / 160 Spe can also be run to outspeed neutral-natured Torterra, Rampardos, and Torterra. 
-Fightinium Z or Choice Specs (with Hydro Pump>Scald) over Leftovers are options for Poliwrath to become a wallbreaker at the expense of longevity. Fightinium Z makes up for the inaccuracy of Focus Blast and is a powerful nuke, where as Choice Specs allows Poliwrath to OHKO Mawile, Torterra, and 2HKO Silvally-Water, Musharna, and Grumpig. 
-Rest-Talk defensive Poliwrath is one of the tier's best physical blanket checks, taking on Pinsir, Golem, Monferno, and Pawniard, while dealing with Bulk Up Vigoroth and other slow setup sweepers. 
-On rain, Z-Belly Drum Poliwrath is a fearsome sweeper. Due to Poliwrath's low BP moves, it needs to be at +6 to effectively sweep teams and net OHKO's. A Jolly Nature allows Poliwrath to outspeed Choice Scarf users such as Simisage, Manectric, and Raichu at the expense of power.
-Poliwrath has the option of running Substitute+Focus Punch since it has poor physical Fighting-type STAB, giving it the ability to dent Mawile, Cradily, and Pyukumuku. This set is niche because of the amount of support it needs to be effective. 
-Poliwrath has more niche options such as Encore to cripple set up sweepers, and Protect+Toxic allows Poliwrath to stall out and cripple the opposing team.