Firstly, a Choice Band or a Salac Berry would suit Sawk much more. And since your Ability is Sturdy you could try Reversal on your team to sweep pretty much everything when it's on 1 HP, but that's optional. So:
Sawk @ Choice Band/ Salac Berry
Ability: Sturdy
EVs: 252 Atk/ 4 SpD/ 252 Spe
Jolly Nature
- Close Combat
- Earthquake
- Poison Jab/ Reversal
- Knock Off
Next, your Bronzong caught my attention. You decided on Psywave instead of Psychic. I think you shouldn't risk it and make it Psychic instead. Besides that, I really like your Bronzong's moveset.
Bronzong @ Leftovers
Ability: Levitate
Calm Nature
- Psychic
- Toxic
- Stealth Rock
- Protect
Last thing I wanted to say is about your Forretress. You gave it Stealth Rock and Spikes, but Forretress actually can't learn Spikes. Plus, only one is necessary, really. So either Stealth Rock, or Toxic Spikes. I'd also like to add the fact that it's a slow Pokémon and it can learn Gyro Ball. So replace a move with Gyro Ball, give it a Relaxed nature, and 0 IVs in Speed. This may sound strange, and will almost guarantee your Forretress goes last every turn, but Gyro Ball depends on how slow you are. And another move- Payback. Since Forretress is super slow, Payback will have double the damage, meaning a power of 100. You definitely want that on your team. Replace it with Volt Switch. And your EV spread- I'd recommend SpD over Atk. This is now your Forretress:
Forretress @ Leftovers
Ability: Overcoat
EVs: 252 HP / 4 SpD / 252 Def
Relaxed Nature
- Stealth Rock/ Toxic Spikes
- Payback
- Gyro Ball
- Explosion
So yeah! Sorry that Forretress was changed so drastically. I think the rest of your team is pretty good, so I didn't change anything. This is the final team:
Blastoise-Mega @ Blastoisinite
Ability: Mega Launcher
EVs: 252 HP / 252 SpA / 4 SpD
Modest Nature
IVs: 0 Atk
- Aura Sphere
- Rapid Spin
- Ice Beam
- Dark Pulse
Slurpuff @ Aguav Berry
Ability: Unburden
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature
- Belly Drum
- Return
- Drain Punch
- Play Rough
Sawk (M) @ Choice Band/ Salac Berry
Ability: Sturdy
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Close Combat
- Earthquake
- Knock Off
- Poison Jab/ Reversal
Bronzong @ Leftovers
Ability: Levitate
EVs: 252 HP / 4 Def / 252 SpD
Calm Nature
IVs: 0 Atk
- Psychic
- Protect
- Stealth Rock
- Toxic
Salazzle (F) @ Focus Sash
Ability: Corrosion
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Dragon Pulse
- Hidden Power [Grass]
- Toxic
- Flamethrower (or Fire Blast)
Forretress @ Leftovers
Ability: Overcoat
EVs: 252 HP / 4 SpD / 252 Def
Relaxed Nature
- Stealth Rock/ Toxic Spikes
- Payback
- Gyro Ball
- Explosion
Hope I helped! :D
