Alright... no flames or anything else, please.  This is JUST opinion and
experience.  This is my first time posting anything, so I don't know how
you'll rate me, but be gentle.  I'm going to discus a card family I rarely
see others use, but it the basis of my Colorless deck.  That would be the
Pidge's -- Pidgey, Pidgeotto, and Pidgeot.  Now, just in case those of you
who have never played them don't remember their stats, here's a run down.

Pidgey
Basic Pokémon
40 HP
Colorless Pokémon
[CC] Whirlwind -- 10 -- If your opponent has any benched Pokémon, he or she
choose 1 of them and switches it with his or her active Pokémon. (So the
damage before switching the Pokémon.)
Weakness: Lightning
Resistance: Fighting
Retreat: -C

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Pidgeotto
Stage 1 -- Evolves from Pidgey
60 HP
Colorless Pokémon
[CC] Whirlwind -- 20 -- If your opponent has any benched Pokémon, he or she
choose 1 of them and switches it with his or her active Pokémon. (So the
damage before switching the Pokémon.)
[CCC] Mirror Move -- If Pidgeotto was attacked last turn, do the final result
of that attack on Pidgeotto to the Defending Pokémon.
Weakness: Lightning
Resistance: Fighting
Retreat: -C

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Pidgeot
Stage 2 -- Evolves from Pidgeotto
80 HP
Colorless Pokémon
[CC] Wing Attack -- 20
[CCC] Hurricane -- 30 -- Unless this attack Knocks Out the Defending Pokémon,
return the Defending Pokémon and all cards attached to it to your opponent's
hand.
Weakness: Lightning
Resistance: Fighting
Retreat: Free.

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First off... Pidgey, I admit is not all that good. Especially pulling him a
little ways into the game. And 10 damage for two energies is not all that
good. But in the early game, it helps bring out weaker bench Pokémon, since
your opponent more than likely laid energy on their Active Pokémon to be able
to attack you. 40 HP is a little sub-par, especially since on the game,
Pidge's are extremely durable, but in the early game, it's managable. Now...
as for Pidgeotto... 20 more HP. 60 is not bad for a Stage 1, although it's
not the worst. And what's this? Those two energies are now douple the damage,
with the same effect. For another energy, Pidgeotto can pull off a Mirror
Move. Always a good thing, especially if Pidgeotto took 50 damage and was
poisoned last turn. You might loose a Pidgeotto, but more than likely your
opponent is now toast. And now... for the big gun. Pidgeot. 80 HP is fairly
common for any Stage 2. Alakazam and Gengar will show you that, and they are
played extremely often. Wing Attack is a no fril, 20 for 2 attack. But
Hurricane on the other hand, can be put to extremely good use. That move can
stop any strategy cold. Rain Dance decks beware... did you use a Breeder to
take that Squirtle of yours right to a Blastoise? Well guess what? You're
back to a Squirtle at best, no way to bring out the 'toise, and you're a heck
of a lot weaker. The same applies to any Stage 2 that was Breedered. And ANY
evolution, or a basic that's pounding at your team will feel this guy's
sting.  Slam a peskey Electabuzz away before it has the chance to give ya the
Thunder Punch. Knock away something being used as a wall, and bring out not
full-evolved bench warmers and pound away. With free retreat, you can come
in, Hurricane away a threat, and retreat. Then if the threat manages to come
back just as powerful, come back out and do it again. Very annoying playing
against them. Venus-center decks won't have their Venusaur to move energy
around. Rain Dance decks loose their Blastoise, and have no way to get it
back right away, since it was more than likely Breedered. Although with only
80 HP and Mews floating around everywhere, you have to be careful. But it's
always a good card to try and work into a deck. Although Stage 2s are tried
more often than not to be avoided, they usually have the best attacks and
other abilities.