In-game reset
Press [A] + [B] + [Start] + [Select] during game play to reset the game.
Get heads on coin
Press [A] when the Pikachu coin is spinning right on Pikachu's face. Note: This requires precise timing.
Free booster pack
To get a free booster pack, go to your PC.
Start a duel with anyone. As soon as you receive your hand, pick the top card and select "Check". Turn off game off, then back on. Choose "Continue" from the diary. When you continue, you will be in front of the person you were dueling previously. They will say that they lost and will give you booster packs. Note: This works on all opponents, including the Grand Masters.
To get the easiest booster packs, fight the girl on the left where the leader is in the Water gym. She has two prizes and always brings out Staryu, Dratini, and Goldeen. Be sure to make a very good Lightning deck. She will only give you two Coliseum packs. Every booster contains a free Gyardos and Diglett; you will find a good selection.
Go to a club and talk to the master. Then, go to a computer to get an easy booster pack, even if you have already gotten that mail.
Unlimited energy cards
In Dr. Masons Lab, both Sam and Aaron will give you a pack full of energy when you defeat them/ Sam only plays with two prizes, making him faster to defeat.
To get ten free energy cards, go to Sam at Dr. Mason's Laboratory. Challenge him to a normal duel. If you get the first move do the following:
1. Place Goldeen on the arena
2. Place Staryu on the bench
3. Attach one water energy on Goldeen
4. Attack with Horn Attack
5. Attach a Psychic energy to Goldeen
6. Evolve it into a Seaking
7. Attack w/ Waterfall
8. Attack with Horn Attack
9. Attach Water energy on Staryu
10. Attack with Waterfall
11. Replace Seaking with Staryu
12. Attack with Slap
13. Use Potion on Staryu
14. Attach any energy on Staryu
15. Attack with Slap
16. Evolve it into Starmie
17. Attack with Starfreeze (2x)
Peek at deck
Use a card that allows you to look in your deck. As soon as you are finished, turn off the game. Select "Continue Duel". You have just peeked at your deck without shuffling.
Peek at prizes
To look at all of your prizes in your duel, defeat the defending Pokemon and look at one of your prizes. Then, either reset the game or shut it off. Select "Continue Duel" and defeat the same Pokemon again and look at other prizes. Repeat this until you see all of your prizes.
Charizard card
Select the Charmander and Friends deck at the start of the game.
Mew card
There is a Mew card with a purple background that looks just like the non lvl 2 version. It can be only acquired through Card Pop, and is extremely rare and powerful.
Easy win
If your opponent sends out Kangashkahn as their first Pokemon, you can easily win by attacking Kangashkahn until it has a few HP remaining. Your opponent will most likely have one energy card attached to Kangashkahn, and will use the attack Fetch. If you do not attack Kangashkahn and knock it out, your opponent will keep drawing cards until they have no cards remaining in their deck.
Booster packs
Professor Mason will give you a booster pack after every email that he sends you.
Talk to the Club Leaders but do not duel them. Check your email and you will get a letter with a booster pack. This works with everyone except the Electric Club leader.
Battle Imikuni? several times and you will get packs such as Evolution and Laboratory packs. He is easy to defeat because he uses cards such as Psyducks and the Special Imikuni? card that confuses his own Pokemon.
Get different cards from Professor Mason
Save the game before reading the email from Professor Mason. Whenever you get a type of card you do not want, reload the game. The cards will be different when the game is resumed.
Energy booster pack
After getting your own deck, go to Sam and offer to play a real duel. You will use the same practice deck and the flow of the game will be the same as during the tutorial. If you win, you will get booster pack full of energy.
Familiar faces
When you go to the Psychic Card Club there is a person in green. He is your character in the Red, Blue, and Yellow versions of Pokemon.
Gene the Rock Club Master looks very similar to Professor Oak when challenged to a match.
Ishihara's disappearance
After you trade Ishihara all the cards she will disappear. Go to the Rock Club and a woman will tell you that Ishihara left.
Start challenge cup faster
Defeat a few people (works best with a few club leaders), then save the game by writing in your diary. Turn off the game. Repeat saving a few more times, then go to Challenge Hall. Note: This does not always work.
Imanuki card
Go to each club lounge until you find Imakuni. Then battle him to get four booster packs for each victory. However, he may instead give you his Imakuni card. Repeat this until you have most of the cards needed to build a healthy deck.
You can use the Imanuki card to cure all status problems. If your Pokemon is affected by a special condition such as Poison or Sleep, play the Imanuki card to cure those problems. You will be confused, but can always get heads on the coin by pressing the [A] button when it is on Pikachu's face.
Promo Slowpoke card
Once you have collected many energies, go to the Fire Club. There will be a person standing by the bookshelf. He will ask you to give all of your extra energy cards that you do not have in your decks. He will then tell you to go two spaces left of the bookshelf (at the picture). Press [A] to get a promotional Slowpoke card, which can use Amnesia and Headbutt. Amnesia calls for two Psychic Energy cards. Headbut does 10 damage and uses one of any kind of energy card.