Have to love Piloswine, I've used two different sets in UU so far, one as a lead (constantly changing) and the other as a straight up revenge killer:
Piloswine @ Focus Sash
Adamant
252 ATK / 252 SPE
- Earthquake
- Ice Shard
- Stealth Rock
- Protect / Endeavor / Toxic
It has the bulk and attack to stay around for a while, giving it later chances to Stealth Rock. The most common taunters are terrified of STAB Earthquake meaning you usually get your own. Not a horrible option like I would have thought.
The much better set is the straight up "Ripped from Mamoswine" Choice Band / Life Orb
Piloswine @ Life Orb / Choice Band
Adamant
252 ATK / 252 SPE
- Earthquake
- Ice Shard
- Stone Edge
- Bite
The main appeal here is you have an immunity to Thunder Wave with a powerful STAB and an extremely reliable answer to Torttera / Venusaur. Mamoswine draws in Moltres like a champ and so Stone Edge is usually the first option. Bite is to catch Rotom on the switch-in, but should be used sparingly. This thing can really mess with stall, as Earthquake/Ice Shard is eliminating a ton of the major players such as Chansey, Altaria, Drapion, Omastar, Torterra, etc. The biggest issue is the Toxic Spikes weakness, and Toxic weakness in general, but that's not extremely hard to fix.
What I really want to do is exploring the EVs. Piloswine has 101 Subs at its access, and I want to use these really bad in order to basically set up and dominate Chansey. I think there are plenty of good things Piloswine can do with adjusted EVs that really create a threat.