Poliwrath @ Leftovers/Expert Belt
Ability: Water Absorb
EVs: 96 HP / 252 SpA / 160 Spe
Modest Nature
- Scald
- Focus Blast
- Ice Beam
- Vacuum Wave
Mesprit @ Choice Scarf
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Mild Nature
- Psychic
- Ice Beam
- U-turn
- Healing Wish
This core slowly but surely wears down this team. Rozes' team doesn't have much for Poliwrath besides RKing with Swallow, and in the wreckage, Mesprit lures in Shiftry and KOs with U-turn (hence the Mild Nature) after rocks. After its usefulness has left, it heals up Poliwrath to score the remaining KOs.