I think that Beedrill is the best grass pokemon, other then Venusaur of course. Beedril does 0-60 damage with twinneedle, usually 30. and poison sting does 40 by the time it rolls back around to beedrill! And, he is resistant to fighting, probably the most popular color along with water. He has 80 HP, which is decent. He also has no retreat cost, so if he has any effects on him, he can run in and out real quick to remove them (poison, possible confusion). Every grass deck needs the Beedrill element to be a great deck.
 
 
  E. Judd