I'm not good at descriptions

Azumarill to break through walls and sweep.
Azumarill @ Choice Scarf
Ability: Huge Power
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Aqua Jet
- Double-Edge
- Brick Break
- Play Rough
Ability: Huge Power
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Aqua Jet
- Double-Edge
- Brick Break
- Play Rough

Clefable @ Leftovers
Ability: Magic Guard
EVs: 252 HP / 172 Def / 84 SpD
Calm Nature
- Calm Mind
- Moonblast
- Soft-Boiled
- Thunder Wave
Ability: Magic Guard
EVs: 252 HP / 172 Def / 84 SpD
Calm Nature
- Calm Mind
- Moonblast
- Soft-Boiled
- Thunder Wave

Gardevoir-Mega @ Gardevoirite
Ability: Pixilate
- Calm Mind
- Hyper Voice
- Psychic
- Moonblast
Ability: Pixilate
- Calm Mind
- Hyper Voice
- Psychic
- Moonblast

I start off with Whimsicott, paralyzing and encoring non-damaging moves, switching out to set up sweepers like gardevoir.
Whimsicott @ Leftovers
Ability: Prankster
EVs: 248 HP / 252 Def / 8 Spe
Bold Nature
- Encore
- Stun Spore
- Moonblast
- U-turn
Ability: Prankster
EVs: 248 HP / 252 Def / 8 Spe
Bold Nature
- Encore
- Stun Spore
- Moonblast
- U-turn

Diancie gives greater defenses to the team, as well as being a decent switch-in option due to tankiness.
Diancie @ Rocky Helmet
Ability: Clear Body
EVs: 4 HP / 252 Def / 252 SpD
Brave Nature
- Diamond Storm
- Earth Power
- Light Screen
- Reflect
Ability: Clear Body
EVs: 4 HP / 252 Def / 252 SpD
Brave Nature
- Diamond Storm
- Earth Power
- Light Screen
- Reflect

Granbull @ Leftovers
Ability: Intimidate
EVs: 248 HP / 8 Atk / 252 Def
Impish Nature
- Play Rough
- Earthquake
- Heal Bell
- Thunder Wave
Ability: Intimidate
EVs: 248 HP / 8 Atk / 252 Def
Impish Nature
- Play Rough
- Earthquake
- Heal Bell
- Thunder Wave