Monotype Rock, Diancie-Mega Style... and swaggy Probopass

Shuckle @ Mental Herb
Ability: Sturdy
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
- Toxic
- Encore
- Sticky Web
- Stealth Rock

Diancie @ Diancite
Ability: Clear Body
EVs: 4 Atk / 252 SpA / 252 Spe
Naive Nature
- Earth Power
- Diamond Storm
- Moonblast
- Hidden Power [Fire]

Terrakion @ Choice Band
Ability: Justified
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Close Combat
- Stone Edge
- Earthquake
- Quick Attack

Cradily @ Leftovers
Ability: Storm Drain
EVs: 252 HP / 200 Def / 4 SpA / 52 SpD
Bold Nature
- Giga Drain
- Mirror Coat
- Recover
- Toxic

Probopass @ Leftovers
Ability: Sturdy
Level: 2
EVs: 252 Spe
Bold Nature
- Pain Split
- Protect
- Toxic
- Magic Coat

Tyranitar @ Assault Vest
Ability: Sand Stream
EVs: 252 HP / 104 Atk / 4 Def / 148 SpD
Brave Nature
- Fire Blast
- Crunch
- Ice Beam
- Stone Edge