Registeel @ Leftovers  
Ability: Clear Body  
EVs: 252 HP / 160 Def / 88 SpD / 8 Spe  
Calm Nature  
IVs: 0 Atk  
- Iron Defense  
- Amnesia  
- Seismic Toss  
- Rest  

Greninja @ Choice Specs  
Ability: Protean  
EVs: 32 Atk / 252 SpA / 224 Spe  
Mild Nature  
- Hydro Cannon  
- Dark Pulse  
- Gunk Shot  
- Low Kick  

Altaria-Mega @ Altarianite  
Ability: Cloud Nine  
EVs: 248 HP / 172 Def / 8 SpA / 60 SpD / 20 Spe  
Bold Nature  
IVs: 0 Atk  
- Cotton Guard  
- Roost  
- Hyper Beam  
- Hyper Voice