Tentacruel @ Waterium Z  
Ability: Rain Dish  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Swords Dance  
- Waterfall  
- Rain Dance  
- Poison Jab  

Aggron-Mega @ Aggronite  
Ability: Sturdy  
EVs: 248 HP / 136 Def / 124 Spe  
Impish Nature  
- Stealth Rock  
- Fire Punch  
- Ice Punch  
- Toxic  

Reuniclus @ Choice Specs  
Ability: Regenerator  
EVs: 172 HP / 84 Def / 252 SpA  
Modest Nature  
IVs: 0 Atk  
- Sleep Talk  
- Psyshock  
- Focus Blast  
- Signal Beam  

Pachirisu (M) @ Leftovers  
Ability: Volt Absorb  
Shiny: Yes  
EVs: 252 HP / 120 SpD / 136 Spe  
Jolly Nature  
- Baby-Doll Eyes  
- Toxic  
- Nuzzle  
- Super Fang  

Zoroark @ Choice Scarf  
Ability: Illusion  
EVs: 4 Atk / 252 SpA / 252 Spe  
Naive Nature  
- Flamethrower  
- Low Kick  
- Grass Knot  
- Dark Pulse  

Shaymin @ Leftovers  
Ability: Natural Cure  
EVs: 252 HP / 4 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Leech Seed  
- Substitute  
- Giga Drain  
- Hidden Power [Fire]