Pokemon Trading Card Game Unlockables and Secrets (GameBoy Color)

Pokémon Trading Card Game is the video game incarnation of the popular Pokémon Trading Card Game (TCG). There are currently two games in the series. Both the series and the card game are based on the famous Pokémon video game series. Mimicking the style of the original Pokémon video games, this series featured the protagonist, Mark, that wanted to be the best at the Pokémon Trading Card Game. He would then travel between areas collecting cards and challenging Club Masters. Upon defeating all of the Club Masters, he would face the Grand Masters.

Afterwards he would fight his rival Ronald for the title of Champion. Winning would bring him the four Legendary Pokémon Cards: Moltres, Zapdos, Articuno, and Dragonite. Each of the Grand Masters built their decks around one of these cards. Ronald uses a deck containing all four.

Unlockables

Duel Machine
In Dr Mason's Lab Beat the Grand Masters and get the Legendary Cards

Secrets

60 Free Energy Cards
The tech in the upper-right corner of the Mason Laboratory will give you 60 free energy cards if you don't have any energy cards (other than the ones in your deck). If you want, you can just make your decks chock full of energy cards and then talk to the guy.

Peek at all of your prize cards.
The prize cards often come in handy while in a heated battle. The only problem is they are turned face-down, so you have no clue which card you are going to pick up after you defeat an opposing card. This is the trick to break that rule:

First, knock out the enemy's card, and when you are told to pick up a prize, choose any one you want. Remember which card you looked at, and reset your Gameboy. Choose the Continue Duel option and you will resume right before you knocked out the enemy's card. Pick up another prize and repeat the process until you either find a card you need, or you know which prizes you have. This trick can really make the difference in a duel.

Here's some gameplay footage from this addictive trading card game: