Swampert @ Leftovers
Impish Nature
EVs: 252 HP / 252 Def / 4 Atk
- Avalanche
- Earthquake
- Waterfall / Stone Edge
- Stealth Rock
Physical Swampert.
Swampert @ Leftovers
Careful Nature
EVs: 252 HP / 168 Def / 100 Sp.Def
- Curse
- Avalanche
- Earthquake
- Stone Edge / Waterfall / Mirror Coat
This may not be as effective as the basic physical Swampert set, however, it can hit harder with the help of Curse. For the final slot, Mirror Coat is an acceptable option, as using Curse will most likely lure in special sweepers. Predict, and punish the opponent for switching.
Swampert @ Choice Band
Adamant Nature
EVs: 252 HP / 252 Atk / 4 Def
- Avalanche
- Earthquake
- Stone Edge / Focus Punch / Waterfall
- Stone Edge / Focus Punch / Waterfall
Dropping Swampert's defence EVs results it in not being capable of enduring damage as well as the other sets, however, you can surprise your opponent with this set. There aren't many people who will expect Swampert to hit this hard with 252 Atk EVs + Choice Band. Hammer Arm can be a substitute for Focus Punch, though it won't guarantee an OHKO on Blissey.