Prepare (Mew) @ Terrain Extender  
Ability: Psychic Surge  
EVs: 252 HP / 4 SpD / 252 Spe  
Jolly Nature  
- Teleport  
- Stealth Rock  
- Taunt  
- Knock Off  

Your (Hydreigon) @ Psychic Seed  
Ability: Unburden  
EVs: 32 Def / 252 SpA / 224 Spe  
Modest Nature  
IVs: 0 Atk  
- Nasty Plot  
- Dark Pulse  
- Flash Cannon  
- Flamethrower  

Gengar @ Focus Sash  
Ability: Adaptability  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Nasty Plot  
- Shadow Ball  
- Sludge Wave  
- Taunt  

Checks (Togekiss) @ Psychic Seed  
Ability: Unburden  
EVs: 64 HP / 252 SpA / 192 Spe  
Modest Nature  
IVs: 0 Atk  
- Nasty Plot  
- Fire Blast  
- Psychic  
- Dazzling Gleam  

Everyone (Cinderace) @ Heavy-Duty Boots  
Ability: Desolate Land  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Pyro Ball  
- High Jump Kick  
- U-turn  
- Court Change  

! (Weavile) @ Life Orb  
Ability: Galvanize  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Knock Off  
- Icicle Crash  
- Ice Shard  
- Double-Edge