Rise Up (Blissey) @ Safety Goggles  
Ability: Prankster  
EVs: 248 HP / 8 Def / 252 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe  
- Encore  
- Will-O-Wisp  
- Baton Pass  
- Recover  

Believer (Deoxys-Attack) @ Focus Sash  
Ability: Huge Power  
EVs: 4 HP / 252 Atk / 252 Spe  
Jolly Nature  
IVs: 0 Def / 0 SpD  
- Close Combat  
- Knock Off  
- Thousand Arrows  
- Sacred Fire  

Yesterday (Slaking) @ Safety Goggles  
Ability: Wonder Guard  
EVs: 248 HP / 252 Def / 8 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe  
- Wish  
- Parting Shot  
- Defog  
- Aromatherapy  

Thunder (Rayquaza-Mega) @ Choice Specs  
Ability: Mold Breaker  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Draco Meteor  
- Oblivion Wing  
- Secret Sword  
- Volt Switch  

MouthOfTheRiver (Gyarados-Mega) @ Lum Berry  
Ability: Huge Power  
EVs: 252 HP / 252 Atk / 4 Def  
Adamant Nature  
- Pursuit  
- Spore  
- Sucker Punch  
- Water Shuriken  

StartOver (Xerneas) @ Iron Plate  
Ability: Wonder Guard  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Shell Smash  
- Judgment  
- Lava Plume  
- Freeze-Dry