3D Battle Arena
Press X on one of your monsters, then press Square instead of using X to attack again.
Attack twice with the "same" monster
This trick only works with monsters that can be fused into new ones through magic cards. Lay the monster down the turn you have it and the fusion magic card in your hand. During the next turn, lay down the magic card face down and attack with the monster, without using the magic on it. Then, go to the magic card and use it on the monster. The monster, which was once grayed, is now usable again. For example, Jirai Gumo (2200/100) is played the second turn and the card Metalmorph is in your hand. The next turn, play Metalmorph face down on the field. Since your opponent does not have a stronger attack or defense of 2200, attack with Jirai Gumo. After the battle sequence, use the Metalmorph on Jirai Gumo and it becomes Launcher Spider (2200/2500) and is no longer grayed. You can either attack again or switch to defense position.
Battling Tip
When you are battling your opponent will always play there strongest monster on there first turn or a trap or magic.
Card Passwords
Card - Password
Blue Eyes White Dragon - 89631139
Man-eating Treasure Chest - 13723605
Magical Ghost - 46474915
Sorcerer Of The Doomed - 49218300
Dark Magician - 46986414
Fissure - 66788016
Claw Reacher - 41218256
Exodia (Head) - 33396948
Ansatsu - 48365709
Man-eating Bug - 54652250
Giant Soldier of Stone - 13039848
Waboku - 12607053
Mystical Elf - 15025844
Curse of Dragon - 28279543
Celtic Guardian - 91152256
Winged Dragon - 877969
Neo The Magic Swordsman - 50930991
Dragon Zombie - 66672569
Witty Phantom - 36304921
Monster Reborn - 83764718
Great White - 13429800
Summoned Skull - 70781052
Mammoth Graveyard - 40374923
Reinforcements - 17814387
Trap Hole - 04206964
Book Of Secret Arts - 91595718
Ancient Elf - 93221206
Beaver Warrior - 32452818
The Stern Mystic - 87557188
Mystic Clown - 47060154
Baron Of The Fiend Sword - 86325596
Change Of Heart - 04031928
Doma The Angel Of Silence - 16972957
Card Destruction - 72892473
Silver Fang - 90357090
Feral Imp - 41392891
Gaia - 06368038
Soul Exchange - 68005187
Deck change
The game displays a password after it has been completed (for example, 92445276, 25774450, 92886423, etc.). This password is to change your deck. After you enter the password, check your cards.
Duplicating cards
Three memory cards are required for this trick. One can be a PlayStation2 memory card if needed. Refer to the memory cards as A, B, and C. Insert memory cards A and C. Memory card A should have the cards you want to duplicate. Copy the Yu-Gi-Oh Forbidden Memories saved game file to memory card C. Start a game and insert memory card B. This memory card be should also have a game in it with a different I.D. Trade the cards that you want from memory card A to memory card B, then reset the game. Return to the PlayStation memory manager and copy the saved game file from memory card C and put it back in memory card A. Memory card A should now have your old file with all the cards that you traded to memory card B. Next, go to trade and put all the cards you traded to memory card B into memory card A. If done correctly, you should have doubled the cards that you wanted.
The following trick gives you extra cards for free without dueling or using starchips. You need two memory cards. Refer to the memory cards as A and B. Memory card A must have a save file on it. Insert memory card B into memory card slot one and start a new game. Save that game to memory card B, then reset the game. Go to the build deck menu and take all the cards you want out of your deck and exit the menu. Save your game and reset the PlayStation. Insert memory card A into memory card slot two. Go into the trade menu and select all the cards (or as many as you can) from memory card B and press Square on controllers one and two. A menu will appear. Press X to select "Trade", then "Yes". You will now have all the cards from memory card B (that you traded) in memory card A.
Easy Starchips
When you start the game you will fight someone. After you defeat them, save your game. Go to free battle and battle all you want to receive 5 Starchips. Keep doing this until you have as many Starchips as needed.
Exodia
Enter the following passwords.
Head: 33396948
Right Leg: 08124921
Left Leg: 44519536
Left Arm: 07902349
Right Arm: 70902349
Gate Guardian Ritual
Have #374 Gate Guardian, #667 Gate Guardian Ritual, #371 Sanga Of The Thunder, #372 Kazejin, and #373 Suijin in your deck. Put them in your field, then put the ritual card.
Great way to get excellent cards
After you beat the Low Meadow Mage, Return to the Card Shop and save. After you save, return to the menu where you can have freeduels. Duel the Low Meadow Mage About 200 times and you may get:
2x Meator B. Dragons 3500ATK
2x Skull Knights 2650ATK
2x Dark magicians 2500ATK
2x Gaia the Fierce Knights 2300ATK
Also duel the other mages to get curse of dragon(2000ATK). The mountain mage should give you this. Then you can fuse Curse of Dragon and Gaia the fierce Knight to make Gaia the Dragon Champion(2600ATK)
Make opponent fuse their cards
On your first turn, put a strong card that the CPU will not be able to kill. It should now put down a card and place it in defense mode. On your second turn, put down a weak card in defense mode and leave the strong card in attack mode. The CPU should fuse its cards. If not, start the battle again.
Never use up Starchips
This trick requires three memory cards. Memory cards A and B should have your main game save. Memory card C should just be any game with a different name than your normal game. Put memory card B in slot one and memory card C in slot two. Load your game, buy your desired cards, then save and back out to the main screen. Then, go to "Trade" and trade all the cards to memory card B. Insert memory card A into slot one and trade the cards back from C to A. You have now purchased cards and gotten them for free.
Passing the Labyrinth
After you win, go Right, Right, Left, Right.
Power up Twin-Headed Thunder Dragon
Use the following trick to power up Twin-Headed Thunder Dragon to 5000+ ATK Points. First, you will need the cards that will create the Twin-Headed Thunder Dragon: Any Dragon + Rock + Thunder or Dragon Zombie + any Thunder. The other cards you will need are one Mountain (Magic), three Horn Of Lights (Magic), and three Dragon Treasure. To get three Horn Of Lights and three Dragon Treasure, try starting a new game on another memory card. Try to start with a deck with the Horn Of Light or Dragon Treasure (getting both of them at the same time is almost impossible); then trade onto the game you are permanently playing. Since you cannot get the magic card back on the temporary memory card, keep starting a new game on your temporary memory card and try to get a starter deck with the Horn Of Light (getting a Raigeki is also good). After all that is done, free duel anyone with the memory card with the permanent game. Have the Twin-Headed Thunder Dragon already on the field, and if it can be done, if all three Horn Of Lights or Dragon Treasures are in your hand, press Up on all of them and combine with the Dragon. If not, just wait and it will happen. With the three Horns, three Dragon Treasures and the Mountain combined with the Dragon, its ATK power should be about 6300.
Combine the Twin-Headed Thunder Dragon with three Dragon Treasure, three Horn Of Light, three Invigoration, two Megamorph, and one Umi. Its ATK power will be about 9800.
Use the following power-ups to power up Twin Headed Thunder Dragon to a 9300 ATK: one Mountain, three Horn Of Lights, three Beast Fangs, three Dragon Treasures, and three Dark Energy.
Rare Combines
Mamoth Of Goldfine= Mamoth Graveyard+Strong Zombie
curse of Dragon=Metal Dragon+zombie
D.Human=Dragon+Weak Soilder
Secret Rare Cards
Go to the password menu and type in these codes:
Effect Code
Tri-Horned Dragon 3911115
Cosmo Queen 38999506
Blue Eyes Ultimate Dragon 23995346
Gate Gaurdian 25833572
Black Skull Dragon 11901678
Millennium Sheild 32012841
Gaia The Dragon Champion 66889139
Red-Eyes B. Dragon 74677422
Summon two Dragons
To summon two Dragons you need to have the Flute Of Summoning Dragon (43973174), The Lord of D. (17985575) and two Dragons in your hand. Put the Flute Of Summoning Dragon on the field when Lord of D. is face up. When you do this you can play two Dragons as a special summoning.
Summoned Skull power-ups
Sword of Dark Destruction
Malevolent Nuzzler
Black Pendant
Bright Castle
BeastFangs
Horn of the Unicorn
Dark Energy
Kunai with chain
Black Pendant
Sword of Dark Destruction
Axe of Despair
Super Rare Card
To get the super rare card get 9,999 star chips and then type in at the password mode 89631139 and then press exchange.
Trap or Magic?
When you are in 1-player mode, and your opponent plays a face-down card in the magic and trap card zone, if it gets darkened, it is a magic card. If it does not get darkened, it is a trap.
Ultra Rare Cards
Go to the pasword menu and put in these three codes: 11901678, 25833572, 33396948.
Various Characters
Enter the codes: 11901678, 25833572, 33396498.
War Lion Ritual
Have #673 War Lion Ritual (card), #483 Garvas, #403 Leogun, and #201 Frenzied Panda.
Zera Ritual
Have #671 Zera Ritual (card), #377 Ryu-kishin Powered, #298 Wicked Dragon with the Ersatz Head, #085 King Of Yamimakai.