Treecko @ Grassy Seed  
Ability: Unburden  
Level: 5  
EVs: 236 Atk / 156 Def / 116 Spe  
Adamant Nature  
- Acrobatics  
- Drain Punch  
- Swords Dance  
- Bullet Seed
Set Details: Treecko carves itself a niche as a sweeper thanks to Unburden and decent offensive power between Acrobatics and Drain Punch. Bullet Seed is preferred 4th slot to break Abra's Focus Sash. Crunch is an option to hit the occasional Steel/Ghost pokemon. 116 Speed EVs allows Treecko to outpace Timid Neutralizing Gas Koffing, +2 Shellder, and +2 Omanyte, while the rest are put into Defense. Grookey is mandadory to have in order to activate Grassy Seed.