Standard Adamant (Dugtrio) @ Choice Band  
Ability: Arena Trap  
EVs: 8 HP / 224 Atk / 40 SpD / 236 Spe  
Adamant Nature  
- Earthquake  
- Rock Slide  
- Hidden Power [Bug]  
- Aerial Ace

Bulky Adamant (Dugtrio) @ Choice Band  
Ability: Arena Trap  
EVs: 40 HP / 200 Atk / 96 SpD / 172 Spe
Adamant Nature  
- Earthquake  
- Rock Slide  
- Hidden Power [Bug]  
- Aerial Ace

Jolly (Dugtrio) @ Choice Band  
Ability: Arena Trap  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Earthquake  
- Hidden Power [Bug]  
- Aerial Ace  
- Rock Slide

Lefties Substitute (Dugtrio) @ Leftovers  
Ability: Arena Trap  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Earthquake  
- Hidden Power [Bug]  
- Aerial Ace  
- Substitute

(No CB Substitute should be only used with multiple Perish Song trappers; if you are running only one you can use a Choice Band instead)