If you haven't beaten the game, the color of the title screen is normally blue. But after you beat the game, the color switches to purple. You can change it back to blue by pressing Up, Up, Down, Down, Left, Right, Left, Right, B, A at the title screen. Input the same code to change it back to purple.

To do this, you need to beat the game first. Then at any time, press Up, Up, Down, Down, Left, Right, Left, Right, B, A and you'll get to see the credits again.

Successfully complete the game to view the credits. To see them again, press Up(2), Down(2), Left, Right, Left, Right, B, A.

Press R at the password machine and enter password to get card:

Talk with Joey with a time wizard in your deck to unlock a special Duel.

Obtain 100 DP.

Unlock the KC Cup.

Duel and defeat everyone in Grandpa's store, then talk to Grandpa. You will enter his in-store tournament the day his store closes.

Win the championship and go to the Mystic Land's Mystic Coliseum. This tournament, unlike the others, is available for replay every day of the week.

Win the previous tournaments and you are able to participate in the regionals. Win the regionals and you can participate in the nationals. Win the nationals and you will get this trophy.

Win the Weekend Tournament seven times or until all characters are unlocked.

Make an Exodia deck your current deck. Go to the card shop. Talk to Grampa and he will ask you to duel against him using an Exodia deck. Both of the lifepoint scores will start at 10. The only way to win is to get all five pieces of Exodia into your hand. Bringing either players' lifepoints to zero will end the duel in a tie.

Create an Exodia Deck and enter Grandpa's store. Talk to him and he will challenge you to a duel to see who can bring out Exodia first.

Create an Exodia Deck and win with it in the Mystic Lands to receive an instant 5,000 DP, plus whatever damage you did to your opponent added to it.

If you manage to defeat your opponent in four turns or less, your DP is multiplied by two. If you defeat them on the second turn, you will get five times the amount. If you can pull off a first turn kill, it becomes ten times the amount.

When you battle Yugi, he is able to ritual summon Black Luster Soldier without tributing any monsters for it. He has at least two of them that he can throw onto the field easily.

Sometimes when you are dueling Yugi Muto, he will summon all Dark Magicians from his hand, and summon ones outside the duel until he has five on the field at the start of the duel. If you win, you gain 2,500 DP.

If you draw all five pieces of Exodia, but then have to toss away a piece due to a card effect, the Exodia sequence plays and the game ends in a draw (such as when you have three pieces and you use Graceful Charity - at one point you have all five pieces in the hand, but you only have four after the effect).

The monster card Giant Orc is named "Giant Oak".

When viewing the monster card Dark Magician, it describes it as the ultimate wizard in terms of attack and "didense" instead of "defense".

In the card description it says attack and "didense"