Hey guys this is my 1st guide so I hope you guys LIKE it :P
WarNinG (Swampert) (M) @ Leftovers
Ability: Torrent
EVs: 252 HP / 252 Atk/ 4 SpD
Adamant Nature
-Earthquake: (STAB MAN!)
-Ice Ball: (Coverage, and it is painful due to the POWER-UP-PUNCH!)
-Power-Up-Punch: (Good to increase Swampert's Attack and become muscular fish.....lol)
-Substitute!: (To block the status like burn, and is a combo with Ice Ball + Power-Up-Punch!)
Well my Swampert will basically switch in when against a wall or something that can't hurt Swampert badly, such as Blissey or Fire Punch. Then I will use Substitute first for some protection. After that, I will see what Pokemon the enemy switches in. If it is not harmful to Swampert, I will use MUSCLE-BUILD-PUNCH and raise my Attack 1 stage. In the opposite scenario, I will switch or damage it with Earthquake. Then, I will see my Substitute has break or not. If not, I just Earthquake it to death, or I will use Substitute again. Due to Swampert's Attack, you may have a chance to OHKO it with the boosted Earthquake, if it is not, just use Ice Ball :D This works when the opposing Pokemon faints with 30 base damage Ice Ball, then the Ice Ball will become a Super Sweeping Ball! So this is my guide, you can comment this if you want :)