Rare cards:
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When you put in a new name such as "GOD OF CARDS" or "HEARTOFCARDS", you will
get a rare card such as Tri-Horn Dragon. If you enter "KONAMI" as a game, you
will get Cosmo Queen. Enter "XBOX" as a game and you will get Zera the Mant.

Use other decks:
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Unlock all tiers in triple duel mode. Then, hold X at the opponent selection
screen in single duel mode to bring up a a deck selection screen. You may now
choose anyone's deck. This allows to you see what is in the other character's
decks and use them against an opponent in single duel mode. Also when at the
single duel screen, hold X. In order for this to work you must unlock all tiers
and view the credits at least once.

Alternate background:
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Press X at the menu with the single or triple duel options to change the
background to that of one of cards that you have unlocked.

Getting higher in triple dueling:
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Getting to the next level is quite easy. If the order is easy, medium, hard, it
could be a challenge. However, by putting them in hard, medium, easy order you
can save your life points for an easy person. You should be able to complete it.

Easy magic and trap cards:
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To get easy magic and trap cards, unlock the Rare Hunter in triple duels. Then,
just keep defeating him until you get the cards that you need. He has all the
best magic and trap cards required for a deck. Note: He three sets of Exodia and
multiple limited cards such as Pot Of Greed.

Easy win:
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Get the magic card that stops all trap cards and set it down face up. Then when
you attack, there are not any trap holes. This is very useful against Grandpa,
because he mostly has trap hole.

Easy surrender:
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If you are tired of waiting for the match to end when you know that you are
going to get defeated, select your deck, and click "Surrender" instead of doing
the hard reset or in-game reset.

Getting characters:
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To get your desired characters for single dueling, you must put them last and
defeat the team.

Getting good cards:
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Kaiba, Yugi, Yami Yugi, and the Rare Hunter will give you good cards when you
defeat them in single duel mode. You can also get cards from their graveyard if
you choose the correct statue.