Tank Seed (Venusaur) @ Black Sludge  
Ability: Overgrow  
EVs: 232 HP / 252 Def / 24 SpD  
Bold Nature  
IVs: 2 Atk / 30 SpA / 30 Spe  
- Grass Knot  
- Hidden Power [Fire]  /  Sludge Bomb
- Leech Seed  
- Sleep Powder