Many people have said that stage two pokemon are to slow to be used as tournament material. I belive that any evolution line where the amount of energy needed to attack corosponds with the first turn that you could play it  is more than quick enough. For example :
 
Turn 1: attach grass energy to weedle and use poison sting.
Turn 2: Attach another grass energy, Evolve into kakunna and use poison powder.
Turn 3: Same deal here, attach energy evolve and attack with twin-neeld or poison sting.
 
Using this you can be assured to deal 70 damage byturn three, more if any of the attacks poison. 
 
This does require a some what heavy amount of card drawing, and ER can mess it up, but there are ways around it. (no removal stadium) .
 
Tell me what you think, and if anyone has another evolution line that does the same thing tell me.
 
 
 
Darklighter        JC_Darklighter@hotmail.com