Unlock more duelists:
After you battle and beat Yu-Gi, Joey, Tea, Tristen and Backura twice you unlock Mai, Weevil, Rex, Mako and Espa. They are harder.
List of opponents:
1. Tristan Taylor, Tea Gardner, Yugi Moto, Joey Wheeler, Bakura Ryou
2. Espa Roba, Mako Tsunami, Rex Raptor, Weevil Underwood, Mai Valentine
3. Umbra & Lumis, Arkana, Rare Hunter, Strings, Marik Ishtar
4. Yami Bakura, Ishizu Ishtar, Kaiba Seto, Shadi, Yami Yugi
5. Maximillion Pegasus, Simon, Duel Computer, Trusdale
(supplied by: CoDeMsTr)
Get more card passwords:
You probably already know this but if you collect cards, at the bottom, left corner there are eight digit numbers. Type them in, but 45% of japanese card passwords will not work.
(supplied by: madmodena37)
Glitches, Misspelling:
Put the arrow on the spot were the opposing Duelist Fusion deck is located and it read "Opponents Fusion Feck" instead of "Opponents Fusion Deck".
When you look at Acid Trap Hole, it reads "Frip 1 face-down defense position monster face-up" instead of "Flip 1 face-down defense position monster face-up."
Look at the Valkyrion The Magna Warrior card. It states that you must tribute alpha, beta, and "%4792" instead of "gamma".
(supplied by: Kingkrum_2000)
Next levels:
Second level: Defeat everyone in the first level two times.
Third level: Defeat everyone in the second level three times.
Fourth level: Defeat everyone in the third level four times.
Fifth level: Defeat everyone in the fourth level five times.
(supplied by: Kingkrum_2000)
Blue-eyes Ultimate Dragon:
To summon The Blue-eyes Ultimate Dragon easier, summon cyber-stien activate his effect then select the Blue-eyes Ultimate Dragon as your fusion monster.
(supplied by: yu-gi-oh04)