Press Up just before the opponent's coin is displayed when battling an opponent. If done correctly, it will land on tails most of the time.

Press A when the Pikachu coin is spinning right on Pikachu's face. Note: This requires precise timing.

Press A + B + Start + Select during game play to reset the game.

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)

Defeat the Grand Masters and get the Legendary Cards to unlock the Duel Machine in Dr. Mason's Lab.

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.

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.

Defeat Sara in the Water Club to get to Colosseum Booster Packs. They each have a Gyarados.

Select the Charmander and Friends deck at the start of the game.

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.

When you have a lot of cards and not a lot of medals, make a deck of Pokemon cards that is strong against the medal you want. For example, if you want the Fire Medal make a deck of Water Pokemon. Note: This trick does not work well for the Psychic Medal, because Psychic is weak against Psychic.

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.

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.

Press B if you do not want to wait for the cards to be done shuffling.

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.

In the Fighting Club, talk to a man on a chair. He will ask you for a Omastar. Give this card and play farther in the game. Then, go back. He will now ask you for a Rapidash, and later for a Weezing. If you do this he will give you a promotional Pikachu level 16 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.

There is a person named Erik in the Science Club, When ever you defeat him, he will give you Evolution Booster Packs. In them is at least two of the following Pokemon: Charmander, Charmeleon, Charizard Squirtle, Wartortle, Blastoise Bulbasaur, Ivysaur, and Venusaur.

First, create a deck that includes four Gastlys, three Haunters, two Gengars, a variety of Colorless cards (at least fifteen), four Pokemon Breeders, and a good amount of Psychic Energy cards. Then, face off against Murray. This fight will be much easier due to the fact that most colorless cards have a resistance to Psychic, and Gastly, Haunter, and Gengar have no weaknesses. After defeating Murray, modify your deck so it also includes four Abras, three Kadabras, two Alakazams, and fewer Colorless cards. Go to the Science Club and fight Rick with your modified Psychic deck. This will be very easy because a majority of the Science Club's cards have weaknesses to Psychic cards.

After you get two medals, go to the Challenge Dome. You will fight three people, including Ronald for a rare Mewtwo card. If you return and compete in different matches, you can receive rarer cards, like a Level 8 Mew.

When you have a bad outcome or use a wrong attack in a battle, just turn the system off. This will save the battle, which you can return to and repeat your turn. This is useful when you do not want to lose a Pokemon. Simply allow your opponent to attack, then turn off the Game Boy.

After defeating the four Grand Masters, go back and fight them again to win more cards.

After you receive your first two medals, save your game. Right after the second medal battle, you will face Ronald or your rival. This way, if you lose, you can restart the card fight. Ronald will also fight you after you win your fourth or fifth medal.

Send out Staryu. Place Goldeen on the bench. Put Water Energy on Staryu. End your turn with Slap. Put Water Energy on Goldeen. Evolve Goldeen into Seaking. Use Slap. Replace Staryu with Seaking. Give Seaking Water Energy and attack. Sam put Raticate. Attack with Waterfall, two times.

After you defeat the four Grand Masters, you will battle Ronald. He got to the cards one step ahead of you. Ronald's deck already has the four legendary cards, and thus is difficult to beat. Use Hitmonlee's (Lv. 30) Stretch Kick and knock out Ronald's benched Pokemons one by one. This is best done when he has his Kangaskhan on the arena, because he will need three energy cards to retreat. Since this kick does not apply resistance on the benched Pokemons, they can still be hurt even if they have resistance to Hitmonlee (Fighting).

When you defeat a Grand Master and are prompted to prepare your deck, answer "Yes". You will be able to save the game. If you lose. just turn off the game and restart at the Grand Master again rather than starting from the beginning or losing the legendary cards. Note: This also is useful during the Challenge Cup.

In order to fight Mitch of the Fighting Club, you must first defeat his three students. They are all training at different clubs. Jessica is in the Lightning Club, in the room on the left. Chris is in the Rock Club in the same room. The last student, Michael, is in the Grass Club just as you walk in. He will be next to the plant. After you defeat them, they will all return to the Fighting Club.