Yu-Gi-Oh! Worldwide Edition: Stairway to the Destined Duel

This game takes place in Battle City.

Start of Game Duelists

• Mokuba Kaiba: The easiest duelist in the game. His strongest card is Kanan the Swordmistress and the only trap card he uses is Magic Jammer. Occasionally, when you challenge Mokuba, Kaiba will intercept and you will duel him instead.
• Tea Gardner: She runs a deck filled with female cards such as Fire Princess, Marie the Fallen One, Sonic Maid, and Lady Assailant of Flames. She'll also pull out fusion monsters like Mystical Sand and Warrior of Tradition from time to time.
• Joey Wheeler: Joey runs a lot of luck-based cards like Skull Dice, Graceful Dice, and Time Wizard.
• Yugi Motou: Yugi mainly runs Magnet Warriors and Spellcasters. He is one of the hardest opponents in the game.
• Seto Kaiba: Seto Kaiba is also a hard duelist. He tries to acquire tributes for his Blue-Eyes White Dragon and if given the opportunity he will use the effect of Cyber-Stein to summon his Blue-Eyes Ultimate Dragon.
• Mai Valentine: Mai runs a general Winged Beast-Type / Wind-Attribute deck with Harpies as her centerpiece. Be careful if you run Cyber Harpie because she can use your own Harpie to activate Elegant Egotist to summon Harpie Lady Sisters.
• Mako Tsunami: Mako Tsunami runs water monsters and the Field Spell Card Umi. He can often pull off an annoying combo of Umi and Tornado Wall that prevents him from taking any Battle Damage.
• Espa Roba: Espa Roba uses a loose "psychic"-themed deck with cards that can allow him to "see" your deck such as Big Eye and Light of Intervention. His most powerful monster is Jinzo.
• Weevil Underwood: Weevil uses Insects, and his goal is usually to bring out his Insect Queen. He also uses many Flip Effect monsters such as Needle Worm, Parasite Paracide, and Man-Eater Bug
• Rex Raptor: Rex Raptor uses Dinosaurs such as Two-Headed King Rex.
• Solomon Muto: Solomon doesn’t quite have a theme however, he does have an Exodia set in his deck.
• Ryo Bakura: He mostly uses the Destiny Board cards and Gravekeeper's Servant.
• Ishizu Ishtar: Her deck is filled with rather powerful Light-Attribute / Fairy-Type monsters such as Hysteric Fairy, Dunames Dark Witch, and The Forgiving Maiden. Some of her other cards include Luminous Spark, Soul of Purity and Light, and St. Joan.

Late Game Duelists

• Marik Ishtar: Dark Monsters leveled with Gravity Bind.
• Bandit Keith: Gamble Cards and Machines
• Duke Devlin: Dice Cards
• Maximillion Pegasus: Pegasus runs a deck filled with Toons
• Rare Hunters: If you lose to them, they will steal your cards. In the early game they are encountered randomly when you talk to passengers, but later you can unlock them as regular opponents.
  • Exodia Rare Hunter: Exodia
  • Strings: Revival Jam
  • Lumis and Umbra: Masks
  • Arkana: Dark Magician
  • Odion: Lots and lots of Trap Cards
• Shadi: He will copy the deck of one of the other opponents in the game (for example: Yugi, Kaiba, and Marik.

Glitches

Bandit Keith

• Occasionally when you start the duel he will only have 4 cards in his hand, 5 after he draws.

• Sometimes when either player uses Cyber Jar a 1 star, normal monster with 0 attack and 0 defense and a completely black picture will get picked up from Bandit Keith's deck, but won't be special summoned and remains in his hand.

• Sometimes the screen will randomly go to a screen where Keith declares the duel a draw.

• When he activates "Gamble", and calls it wrong, you better hope to finish him off that turn, or stop his card with anything you have, because when the game tries to go to his turn, it skips it, which ends the duel, (which it shouldn't, as it should let you start another turn) resulting in a DRAW, no matter how badly you were beating him.

Marik

• If you have already begun to have the random announcements proclaiming that rare hunters are on the loose and enter one of the tournaments there is a chance that Marik will show up as your random opponent, even if you haven't faced him in the normal storyline.

Espa Roba

• Fighting Espa Roba the day before a Challenge Cup makes it not happen, for some reason.

Dice

• If you press any button when you or your opponent uses Graceful Dice or Skull Dice, the game will freeze. Normally you can get by this by pressing the A button to skip the cut scene sequence that freezes the game.

Sangan

• If you use Premature Burial on Sangan, and then use Dark Hole, you'll be able to use Sangan's effect twice instead of once

Change your target week target

• If you don't like your target week targets press START to bring up the language menu. Then leave the language alone and press B the guy will announce target week again and give you two new targets.

Spear Cretin + The Immortal of Thunder

• Try reviving The Immortal of Thunder face down with Spear Cretins effect,

if your opponent attacks and kills it you get 3000 LP for the flip effect and they lose 5000 LP when the copy of Immortal is put in their graveyard. (Spear Cretin just creates copies of cards from the graveyards that, once destroyed end up in the wrong graveyard)

Musician King

• Use Polymerization on a Witch of the Black Forest on the field along with a fusion substitute monster to fuse them into the Musician King and trigger the effect of the Witch twice.

Overlap Monster Cards

• If you use 2 "Change of Heart" Magic cards, on 2 different monsters (that are beside each other), when you end your turn, the first card will return normally, but when the second returns, it overlaps the first, never to be seen again anywhere that duel.

Hourglass of Courage

• Normally this card has to be face-up on the field for 3 full turns for its double ATK/DEF effect to work, but if you use "Call of the Haunted" to revive it during your opponent's turn, on your turn following the opponent's, it's effect is applied, even though it's only the second turn.