Serperior @ Leftovers  
Ability: Contrary  
EVs: 248 HP / 4 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Leech Seed  
- Substitute  
- Taunt  
- Leaf Storm  

Heatran @ Air Balloon  
Ability: Flash Fire  
EVs: 96 HP / 188 SpA / 104 SpD / 120 Spe  
Modest Nature  
- Overheat  
- Flash Cannon  
- Earth Power  
- Rock Tomb  

Altaria-Mega @ Altarianite  
Ability: Cloud Nine  
EVs: 252 HP / 128 Def / 28 SpA / 100 SpD  
Calm Nature  
IVs: 0 Atk  
- Roost  
- Cotton Guard  
- Hyper Voice  
- Hyper Beam