Dragapult @ Sitrus Berry  
Ability: Infiltrator  
EVs: 244 HP / 160 Def / 104 SpD  
Jolly Nature  
- Substitute  
- Disable  
- Curse  
- Phantom Force  

Magneton @ Choice Specs  
Ability: Sturdy  
EVs: 4 Def / 252 SpA / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Flash Cannon  
- Thunderbolt  
- Steel Beam  
- Hyper Beam  

Rillaboom @ Grassy Seed  
Ability: Grassy Surge  
EVs: 248 HP / 48 Def / 168 SpD / 44 Spe  
Careful Nature  
- Drum Beating  
- Leech Seed  
- Substitute  
- Protect