Tank (Swampert) @ Leftovers  
Ability: Torrent  
EVs: 252 HP / 216 Def / 40 SpD  
Relaxed Nature  
- Stealth Rock  
- Earthquake  
- Ice Beam  
- Roar / Protect / Surf

Band Pert (Swampert) @ Choice Band
EVs: 172 HP / 252 Atk / 84 Spe
Adamant Nature
- Waterfall
- Earthquake
- Stone Edge / Superpower
- Ice Punch

Curse (Swampert) @ Leftovers
EVs: 252 HP / 40 Def / 216 SpD
Careful Nature
- Curse
- Earthquake / Waterfall
- Avalanche / Sleep Talk
- Rest

Specs Pert (Swampert) @ Choice Specs  
Ability: Torrent  
EVs: 232 SpA / 24 SpD / 252 Spe  
Modest Nature  
IVs: 3 Atk / 30 SpA  
- Hydro Pump  
- Earth Power  
- Ice Beam  
- Hidden Power [Electric]