Registeel @ Leftovers  
Ability: Clear Body  
EVs: 248 HP / 172 Def / 84 SpD / 4 Spe  
Careful Nature  
- Iron Defense  
- Amnesia  
- Seismic Toss  
- Rest  

Volcanion @ Choice Specs  
Ability: Water Absorb  
EVs: 248 HP / 92 Def / 132 SpA / 28 SpD / 8 Spe  
Modest Nature  
IVs: 0 Atk  
- Overheat  
- Steam Eruption  
- Sludge Wave  
- Hidden Power [Ice]  

Altaria-Mega @ Altarianite  
Ability: Cloud Nine  
EVs: 240 HP / 116 Def / 28 SpA / 100 SpD / 24 Spe  
Calm Nature  
IVs: 0 Atk  
- Hyper Voice  
- Cotton Guard  
- Hyper Beam  
- Roost