I cant believe some of the stuff I'm hearing.Most is about farfetched, 
chansey, and charizard.  I want to clear this up from the start - THERE IS NO 
PERFECT CARD.I know some are better than others, but ALL cards have some 
disadvantage.  Here are several for farfetchd-
1.  It only has 50 HP!  definitely not worth 3 energies.
2.  Its first attack only works once, has 50% chance of failing, and if it 
works only    	does30.
3.  it takes 3 energy to definitely do 30.Dewgong, kadabra, and gyarados do 
50 for 3 	energy. 
4.  "but its colorless!"- SO WHAT?its not the only colorless, and I can sure 
think of 	better.

CHANSEY AND CHARIZARD

  I think too many people look at the numbers and dont think about the cards' 
disadvantages(Which are pretty big)  I will say that i'd probably use the 
charizard before chansey,though.

I think that effects of attacks can be good, if not better than, the attacks 
themselves.
Take venomoth - It only takes 2 energy, but has a good attack and lots of HP.
first, it can use its pokemon power - shift - to change its type to that of 
any in play.
If your opponent's weakness matches the type of a pokemon on either 
bench(which it normally does)you deal twice as much(which, unfortunately, is 
only 20).  But if you flip a coin and get heads, your opponent is confused 
AND poisoned.  Once that happens, he'll deteriorate quickly.

Also fast attack is a good strategy because you have a smaller chance of 
being stranded without energy(most fast pokemon have a low energy cost)and 
you get the upper hand in the beginning, giving him no time to recover and 
build up his pokemon.
He will be spending all his resources trying to catch up.
The only downside is that fast pokemon are generally weaker, and if he 
manages to recover and catch up he can take the lead.  
some fast evolution pokemon are- Raichu, Venomoth, Eevee evolutions, and 
pretty much any stage 1.  Fast, good basics include hitmonchan, electabuzz, 
and jynx.

I've also noticed that when you have a lot of evolution, you cant have too 
many different cards, and cant have a lot of stage twos.  Why?  If you have 
beedrills, venusaurs, nidokings, dewgongs , blastoises, gyarados, etc, It 
becomes EXTREMELY difficult to get corresponding basics and evolutions.  I 
normally use 1 or 2 stage 2s and 4 or 5 total different cards.EX - My deck 
has nidokings(st 2), raichus(st 1), jolteons(st 1), electrodes(st 1), and 
venomoths(st 1).  Also you need more than 1.If you have 1 alakazam, its hard 
to get it out.  I like to pyramid my evolutions, too.EX - 2 nidoking, 3 
nidorino, 4 nidoran.  For every stage of evolution, I have one more of the 
previous evolution.

          Hope I helped you - If you want to argue with me(And I've heard 
ENOUGH about chansey, farfetch'd, and charizard) Write me at 
"souper245@aol.com"