Underpowered (Rayquaza-Mega) @ Focus Sash  
Ability: Delta Stream  
EVs: 4 Atk / 252 SpA / 252 Spe  
Hasty Nature  
- Ice Beam  
- Draco Meteor  
- Extreme Speed  
- Dragon Ascent  

Real Champion (Taillow) @ Focus Sash  
Ability: Scrappy  
Level: 1  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Endeavor  
- Quick Attack  
- Brave Bird  
- Toxic  

Arceus @ Leftovers  
Ability: Multitype  
EVs: 252 HP / 4 Def / 252 SpD  
Calm Nature  
IVs: 0 Atk  
- Perish Song  
- Protect  
- Trick Room  
- Cosmic Power