Constructing a deck in the Pokemon Trading Card Game is one of the most daunting tasks in all of Pokemon. There are so many cards out there, yet you are limited to a total of only 60 cards in your deck. How do you know which Pokemon cards to put in and how many of each? Chittenango Pokemon booster box has some nice tips on this.
There are 3 types of cards you will be putting in your Pokemon deck: Pokemon, Trainers, and Energy. The first of this trio you will need to concentrate on is the actual Pokemon. When you are choosing which Pokemon cards to use in your deck, I recommend that you narrow your focus to only 1 or 2 attacking Pokemon. The rest of the Pokemon you use should be used for support; that is to say those Pokemon should not be used to inflict damage, but help get your attacking Pokemon in play.
It can be tempting to fill your deck with several attackers, but you will find much more success by centering your strategy on a select couple of Pokemon. You should run multiple of these Pokemon, meaning you should use 3 to 4 copies of the basic Pokemon, and 3 to 4 copies of its evolutions. This gives you a high probability of getting this Pokemon in play, and also gives you a better chance of getting several of this Pokemon in play. You will need to work out the specific numbers to see what works best for you.
A good total for the number of Pokemon you use in your deck should be around 17 to 23. Next you should pick which energy you want to play in your deck. Naturally, you will want to match up the energy with the 1 or 2 types of attacking Pokemon you are using in your deck. The total number of energy you use in your deck can range from 14 to 16, but totals lower than those numbers can be effective depending on which Pokemon are used.
Lastly, fill the remainder of your deck with trainer cards. You will want to use around 21 to 29 trainers. A good chunk of that quota should be trainers that allow you to get your Pokemon in play quicker. Most supporter cards can help you do this.
Be sure to use at least a few trainers that have abilities that can help you by removing damage, recovering knocked out Pokemon, or switching your Pokemon around. Do not use all trainers that help you get Pokemon out, you will kind it to be overkill. I hope this advice helps you get started on your way to becoming a Pokemon card master. Remember to keep trying a different card combination to figure out what works best for you!