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

Get tails on coin:
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.

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.

Four booster packs from battling:
Go to Imanaku in the Fighting Club after talking to a girl at the Fire Club. Talk to her and she will tell you to look for Imanaku. Battle him. If you win, he will give you four booster packs.

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)

Organize your cards:
Press Select to organize your cards.

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.

Charizard card:
Select the Charmander and Friends deck at the start of the game.

Easy medals:
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.

Easy win decks:

There is no penalty for not having a basic Pokemon in your hand, so you should make the following deck:
Pokeball's, Computer Searches, or any other Trainers that may help
4 Exeggcute
4 Exeggcutor
As many Plant and Psychic energy as possible
Get an Exxegutor out and start placing energies. Use Exeggitor's Big Explosion attack, which does 20x the amount of heads, one per energy card. There is no limit to the damage, so 20 energy x 20 heads = 400 damage.

4 Hitmonlee
4 Hitmonchan
About 32 or more Fighting
4 Defenders
4 Pluspowers
2 Bills
2 Energy Searches

2 Hitmonlee
2 Hitmonchan
4 Cubone
4 Marowak
4 Machop
4 Machoke
4 Machamp
4 Defender
4 Pluspower
28 Fighting energies

21 Fire Energy
3 Charmander LV.10
2 Charmeleon LV.32
1 Charizard LV.76
2 Vulpix LV.11
1 Ninetails LV.32
1 Ninetails LV.35
4 Growlithe LV.
3 Arcanine LV.
4 Ponyta LV.
3 Rapidash LV.
4 Magmar LV.
1 Moltres LV.
1 Moltres LV.
2 Professor Oak
2 Bill
1 Pokeball
1 Pokedex
3 Potion
This is the "Flames Of Death" deck

Defeat Courtney with the following deck.
25 Water Energy
3 Squitle
2 Wartotle
2 Blastoise
3 Seel
2 Dewgong
3 Magikarp
2 Gyarados
4 Lapras

Defeat Steve easily with the following deck.
25 Fighting Energy
3 Diglet
2 Dugtrio
1 Hitmonlee
4 Hitmonchan
3 Aerodactyl
1 Kangaskhan
3 Dratini
2 Dragonair
1 Dragonite (Legendary Edition)
4 Bill
1 Pokemon Trader
3 Mysterious Fossil
1 Switch
4 Gust Of Wind
2 Potion

Defeat Jack easily with the following deck.
25 Lightning Energy
2 Pikachu (Jungle Edition)
1 Pikachu (Promotional Edition)
1 Raichu (Base Edition)
1 Raichu (Fossil Edition)
1 Magnemite
1 Magneton (Base Edition)
2 Voltorb
1 Electrode (Jungle Edition)
4 Electabuzz (Base Edition)
1 Jolteon
1 Zapdos (Fossil Edition
2 Kangaskhan
1 Ditto (Promotional Edition)
2 Eevee
1 Snorlax
4 Bill
1 Energy Removal
1 Poke Ball
4 Defender
3 Gust Of Wind

Defeat Rod and Ronald easily with the following deck.
25 Grass Energy
3 Bulbasaur
2 Ivysaur
1 Venusaur
4 Weedle
3 Kakuna
2 Beedrill
3 Nidoran Male
2 Nidorino
1 Nidoking
2 Grimer
1 Muk
2 Scyther
3 Dratini
2 Dragonair
1 Dragonite (Promotional Edition)

19 Pokemon
4 Charmander
3 Charmeleon
2 Charizard
4 Growlith
3 Arcanine
3 Magmar (fossil)
17 Trainers
4 Bills
1 Professor Oak
2 Pokemon Breeder
4 Switch
4 Energy Removal
3 Super Energy Removal
23 Energy
20 Fire Energy
3 Rainbow Energy

Booster packs:
Professor Mason will give you a booster pack after every email that he 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.

Walking faster:
Hold B while walking to move faster.

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.

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

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.

Check your prizes:
When you defeat your opponent's Pokemon, you can draw a prize. Draw a prize then turn off your game. Turn it back on, then press Start at the title screen. Select "Continue Duel" and resume just before your opponent's Pokemon fainted. Faint it again and select a different prize. Repeat this step and you will see all your prizes.

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.

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.

Challenge Cup prizes:
Go to the top center of the game map to find the Challenge Cup. You can compete in the Challenge Cup located in the Challenge Hall after you obtain your 3rd and 5th medal. If you battle there, you will get a rare card. It is hard to get in, because it is usually closed. Keep on visiting after every battle. If you enter you, will fight three trainers. The third one will be Ronald if you did not beat the game. After you beat the game, Ronald will not appear. These are the cards that you can get:

Mewtwo Lv. 60: The one that comes with the Pokemon VHS
Mewtwo Lv. 60: The one obtained if you went to the movies
Mew Lv. 8: Game Boy only
Surfing Pikachu Lv. 13: Game Boy only or Japanese card
Surfing Pikachu Lv. 13: Same as above, but a different number
Flying Pikachu Lv. 12: Game Boy only or Japanese card
Ivy Pikachu Lv. 16: Promo #1
Slowpoke Lv. 9: Game Boy only
Jigglypuff Lv.12: #2 (?)
Pikachu Lv. 16: You get it if you went to the movies
Electabuzz Lv. 20: You get it at the movies
Super Energy Retrieval: Game Boy only

Different cards in Challenge Cup:
When you are in the Challenge Cup, save the game after defeating the second to the last opponent. After you defeat the opponent and win a card, if it is one that you already have or do not want, shut off the game and continue from the save. You should be at the very last opponent. After you defeat him there will be a different card than the last time. Note: Continue this if needed.

Card Pop! Specials:
The following very rare cards are only obtainable in Card Pop!.

Lv.15 Mew HP 50
1. Mystery Attack (Does a random damage or may cause random effect)

Lv.64 Venusaur HP 100
1. Pokemon Power: Solar Power (Cures both Pokemon from an effect)
2. Mega Drain (Does 40 damage, removes damage equal to half of damage of the defending Pokemon)

Grand Masters victory:
When you defeat the Grand Masters, go to the deck machine on the top of the screen before you get the cards to build a strong deck. If you do not do this, the game will proceed to the credits and you will have to battle again,

Fire Club trade:
To get the Lv.9 promo Slowpoke easier, put all of your energies except one in temporary decks. Then, talk to the boy. He will reveal the location for only 1 energy.

Finding Mitch's students:
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.

Defeat the Grand Champions:
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.

Defeating the 8 Club Masters:

Gene of the Rock Club: use a grass and water deck
Amy of the Water Club: use a lightning and fighting deck
Isaac of the Lightning Club: use a fighting and colorless deck
Nikki of the Grass Club: use an all fire deck
Rick of the Science Club: use psychic and lightning deck
Murray of the Psychic Club: use a psychic and colorless deck
Ken of the Fire Club: use a water and fighting deck
Mitch of the Fighting Club: use a psychic and colorless deck

Defeating Ronald:
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).

Try the following when in a room that when you leave, has you play against Ronald. Even if you have defeated the Boss/Leader, he/she and his/her cronies still can fought be repeatedly defeated for two booster packs a piece. This will allow you to get the cards needed to defeat Ronald.

Defeating Sam:
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.

Ronald's revenge:
After you get all 228 cards, go to the Challenge Hall and the last person you battle will be Ronald.

Rare 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.

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

Writing in the Diary:
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.

Retry battle:
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.

Glitch: Play with no prizes:
Evolve a Ghastly into a Gengar. Then, take all but one prize. If your opponent has any Pokemon with only ten HP remaining, use Gengar Pokemon Power: Curse and move a damage counter from one of the other Pokemon to that Pokemon. This will knock out that Pokemon. Take your last prize. When the "Decision" screen appears turn off your Game Boy. Start the game again and choose to continue the duel. Go to the "Check" menu, then check play area. You will notice that you have no prizes left. Note: You will have to knock out another Pokemon to win the duel.