Okay, our deck today comes to us from a trainer that can't seem to get a
winning deck going. Let's see what we can do to help him to win a bit more.
;)
>>>>
Hi Satoshi,
I've made a bunch of decks but I can't seem to get a good enough deck that I
can win enough with, and I didn't know how to send one of my deck lists for
help to you or one of these deck mechanics until recently.  I also do not
know how or what this deck needs to be fixed.

Here is my deck: Fire/Water Deck
(I know you said to not have mainly 1 of each card, but for most of these I
have only 1)
(There are a lot of good cards that I don't have, ex: Suicune, Cleffa,
Rocket's Zapdos, Nightly Garbage Run, Gold Berry, Darkness Energy, etc., so
I have these cards to try to substitute them)

15 Water Pokemon
1 Squirtle (Base Set)
2 Squirtle (Team Rocket)
2 Dark Wartortle
1 Dark Blastoise
1 Horsea (Fossil)
1 Horsea (Neo Genesis)
1 Seadra (Fossil)
1 Seadra (Neo Genesis)
1 Kingdra (Neo Genesis)
1 Articuno (2nd Movie Promo)
2 Wooper (Neo Discovery)
1 Quagsire (Neo Revelations)

15 Fire Pokemon
2 Charmander (Base Set)
1 Charmander (Team Rocket)
1 Dark Charmeleon
1 Dark Charizard
1 Rocket's Moltres (Gym Heroes)
2 Cyndaquil [Fireworks, Quick Attack]
2 Cyndaquil [Leer, Swift]
2 Quilava [Smokescreen, Char]
1 Typhlosion [Fire Recharge, Flame Burst]
1 Magby
1 Entei (Neo Revelations, Non Holographic)

15 Trainers
2 Berry
1 Bill
1 Bill's Teleporter
1 Blaine's Quiz #1
1 Chaos Gym
2 Moo-Moo Milk
1 Pokemon Breeder Fields
1 Potion
2 Professor Elm
1 Professor Oak
1 Rocket's Hideout
1 Rocket's Sneak Attack

15 Energys
1 Rainbow Energy
8 Fire Energy
6 Water Energy

Please help me.
-FlameGreymon
>>>>
Well, it's evenly divided. =/

Let's start by taking a look at the Water portion of your Pokémon selection:

15 Water Pokemon
1 Squirtle (Base Set)
2 Squirtle (Team Rocket)
2 Dark Wartortle
1 Dark Blastoise
1 Horsea (Fossil)
1 Horsea (Neo Genesis)
1 Seadra (Fossil)
1 Seadra (Neo Genesis)
1 Kingdra (Neo Genesis)
1 Articuno (2nd Movie Promo)
2 Wooper (Neo Discovery)
1 Quagsire (Neo Revelations)

Hmm...interesting. We've got a LOT of singles to deal with, and I have a
feeling a few of the evolution lines need to go.
Start off by clearing away some of the riff-raff. Articuno, the base
Squirtle, the Dark Wartortle, Quagsire and the ENTIRE Kingdra line. This
leaves us with 10 spaces to play with. Drop in 3 more Team Rocket Squirtle,
3 Cleffa, a third Wooper and 3 Dark Blastosie. So much for those spaces,
huh? ;\ But now our Water Pokémon Look like this:

4 Squirtle
4 Dark Blastoise
3 Cleffa
3 Wooper

Next, we move onto the Fire Pokémon:

15 Fire Pokemon
2 Charmander (Base Set)
1 Charmander (Team Rocket)
1 Dark Charmeleon
1 Dark Charizard
1 Rocket's Moltres (Gym Heroes)
2 Cyndaquil [Fireworks, Quick Attack]
2 Cyndaquil [Leer, Swift]
2 Quilava [Smokescreen, Char]
1 Typhlosion [Fire Recharge, Flame Burst]
1 Magby
1 Entei (Neo Revelations, Non Holographic)

Well, we're going to cut down a LOT here...

Since we're already using Dark Blastoise, I say we go with Dark Charizard
here. That said, we'll be ditching the Rocket's Moltres, Typhlosion lines,
Entei and Magby, and we'll make the tr Charmander a copy of its base set
twin. We've got 10 spaces to work with here as well, so let's add in another
2 more Dark Charmeleon and 2 more Dark Charizard, leaving the other spaces
for the trainers:

3 Charmander
3 Dark Charmeleon
3 Dark Charizard

Finally, we're onto the trainers:

15 Trainers
2 Berry
1 Bill
1 Bill's Teleporter
1 Blaine's Quiz #1
1 Chaos Gym
2 Moo-Moo Milk
1 Pokemon Breeder Fields
1 Potion
2 Professor Elm
1 Professor Oak
1 Rocket's Hideout
1 Rocket's Sneak Attack

We've got 6 leftover spaces, so let's being with those. Add in the usual
search engine: 3 Computer Search, and 3 Itemfinder. Next, ditch the Berry
and Bill for three Professor Oak. Knock out the Bill's Teleporter and
Blaine's Quiz #1 for two more Rocket's Hideout. Chaos Gym and Moo-Moo Milk
can go for three Gold Berry. Next, we'll ditch the last Elm for a Trash
Exchange. We'll finally ditch the Potion, Pokemon Breeder Fields, one Elm
and the Pokemon Breeder Fields for four Pokemon Breeder. Hope you caught all
that. ;)

15 Energys
1 Rainbow Energy
8 Fire Energy
6 Water Energy

Not much to do here...make it 8 Fire and 7 Water energy...we're done!

Whew...there ya go...that was quite a workout. :) Good luck and happy
gaming!