Cacturne @ Life Orb  
Ability: Water Absorb  
EVs: 4 Atk / 252 SpA / 252 Spe  
Rash Nature  
- Dark Pulse  
- Giga Drain  
- Sucker Punch  
- Focus Blast  

Delphox @ Choice Scarf  
Ability: Blaze  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Fire Blast  
- Psyshock  
- Grass Knot  
- Trick  

Samurott @ Buginium Z  
Ability: Torrent  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Waterfall  
- Aqua Jet  
- Megahorn  
- Swords Dance  

Garbodor @ Rocky Helmet  
Ability: Aftermath  
EVs: 252 HP / 192 Def / 64 Spe  
Impish Nature  
- Gunk Shot  
- Spikes  
- Toxic Spikes  
- Psychic  

Xatu @ Rocky Helmet  
Ability: Magic Bounce  
EVs: 252 HP / 252 Def / 4 SpA  
Bold Nature  
- Protect  
- U-turn  
- Roost  
- Psychic  

Piloswine @ Eviolite  
Ability: Thick Fat  
EVs: 232 HP / 236 Atk / 40 Spe  
Adamant Nature  
- Icicle Crash  
- Rock Tomb  
- Earthquake  
- Stealth Rock

alternatively:  

Whimsicott @ Life Orb / Choice Specs 
Ability: Prankster  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Moonblast  
- Energy Ball / Giga Drain 
- Psychic  
- Memento / Nature Power