Archen @ Berry Juice  
Ability: Defeatist  
Level: 5  
EVs: 180 Atk / 76 Def / 4 SpA / 196 Spe  
Jolly / Naive Nature  
- Dragon Ascent  
- Earthquake / Hidden Power [Grass]
- Knock Off / Diamond Storm / Rock Blast / Hidden Power [Grass]  
- U-turn / Knock Off
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Optional Move(s):
- Stealth Rock  
- Accelerock  
- Defog  
- Rock Polish  
Optional Item(s):
- Flyinium Z
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Overview:
Archen's high Attack stat and strong offensive STAB turns it into one of a hardest hitters in the game. Its access to good coverage move and utility moves helps Archen in its offensive role. However, Archen is hindered with a worst ability in the game, which greatly hurts its offensive presence if its below half of its HP in conjuction with its frailty and a weakness to Stealth Rock.
While it is fast enough, there are still pokemon that are faster than it such as Gastly, Staryu and Elekid.