Hippowdon @ Leftovers
Ability: Sand Stream
EVs: 248 HP / 144 Def / 116 SpD 
Impish Nature
- Stealth Rock
- Earthquake
- Slack Off
- Whirlwind

Excadrill @ Choice Band
Ability: Sand Rush
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Iron Head
- Earthquake
- Rock Slide
- Rapid Spin

Seismitoad @ Choice Specs
Ability: Water Absorb
EVs: 156 HP / 252 SpA / 100 Spe 
Modest Nature
IVs: 0 Atk
- Sludge Wave
- Scald
- Earth Power
- Grass Knot

Landorus (M) @ Life Orb 
Ability: Sheer Force 
EVs: 252 SpA / 4 SpD / 252 Spe 
Timid Nature 
IVs: 0 Atk 
- Earth Power 
- Focus Blast 
- Sludge Wave 
- Gravity

Dugtrio @ Focus Sash
Ability: Arena Trap
EVs: 252 Atk / 4 SpD / 252 Spe
IVs: 28 HP / 2 Def
Jolly Nature
- Earthquake
- Reversal
- Sucker Punch
- Memento

Garchomp-Mega @ Garchompite  
Ability: Rough Skin  
EVs: 2 HP / 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Swords Dance  
- Earthquake  
- Stone Edge  
- Fire Fang  

or

Garchomp-Mega @ Garchompite  
Ability: Rough Skin  
EVs: 4 Atk / 252 SpA / 252 Spe  
Naive Nature  
- Draco Meteor  
- Fire Blast  
- Earthquake  
- Stone Edge