I used Poli in my first team on PO, and found him less useful than Gen IV so far (I use him in my standard OU team).
The set I ran was:
Poliwrath @ Leftovers
Impish
252 HP/ 252 Def/ 4 Sp Def
- Brick Break
- Waterfall
- Bulk Up
- Overhead Throw
I ran this with Focus Punch in place of Overhead Throw in Gen IV.
While he does a decent job at sticking around, I found it hard to get Bulk Ups in, so his damage output stayed relatively low. Overhead Throw is great to remove a counter as soon as it switches in, but gets predictable so needs to be used well (also not 100% accuracy). I think Focus Punch is still a better option to hit the counter (probably resisted, but it'll still take a chunk out) and then switch.
Burunkeru in particular walls him to pieces and is so common that he could make zero impact until jelly was got rid of (also a hard task).
I now run a similar set with Bulk Up/Dragon Tail Zuruzukin and I find him much more deserving of a place on my team, so I'm sorry to say Poliwrath's been benched for now.
The set I ran was:
Poliwrath @ Leftovers
Impish
252 HP/ 252 Def/ 4 Sp Def
- Brick Break
- Waterfall
- Bulk Up
- Overhead Throw
I ran this with Focus Punch in place of Overhead Throw in Gen IV.
While he does a decent job at sticking around, I found it hard to get Bulk Ups in, so his damage output stayed relatively low. Overhead Throw is great to remove a counter as soon as it switches in, but gets predictable so needs to be used well (also not 100% accuracy). I think Focus Punch is still a better option to hit the counter (probably resisted, but it'll still take a chunk out) and then switch.
Burunkeru in particular walls him to pieces and is so common that he could make zero impact until jelly was got rid of (also a hard task).
I now run a similar set with Bulk Up/Dragon Tail Zuruzukin and I find him much more deserving of a place on my team, so I'm sorry to say Poliwrath's been benched for now.