Rare Hunter/Ghouls appearances
Arkana: Card Shop Basement
Exodia RareHunter: Cemetery
Strings: The back part of the bridge when watching Kaiba defeat someone, and after you finish talking or dueling most of the people in that area.
Normal Rare Hunters: They will appear in every location when you reach a certain part of the game.
Controlled Bandit Keith: Park and then at the Pier
Umbra and Lumis: In the front of the "Building", which is the place where you see Mai and Joey for the second time. Note: Umbra and Lumis only appear after you ask, then duel the Security Guard in front of Kaiba Corp. when you get up to the part where you and Yugi have to search for Joey and Tea since they have been kidnapped. When you finish dueling him he should tell you where Mokuba is. When he does so, go to the location called the "Building" and you should see them there.
Marik Ishtar/Namu: In Yugi's grandfather's shop when you first meet him. Sis second appearance will be at the finals.
Yami Marik: He will appear in the Finals after you beat Odion in the Semi-Finals.
Blue Eyes Ultimate Dragon (alternate version)
When you get to the part where you have to duel Kaiba to pass Ishizu's test, defeat him and he will give you The Blue Eyes Ultimate Dragon.
Cyber Harpie
Before taking part in the tournament (before meeting in Trusdale's shop), go to the aquarium. You will see May Valentine talking with a Hollywood actor. She will let you do the fighting with him. Defeat him, then take part in the final tournament. At the stadium waiting for Odion, talk with May and she will give you the card, Cyber Harpie.
Joey Wheeler and T'ea Gardner
After defeating Mako Tsunami and getting the sixth Locator Card, talk to Tristan Taylor and defeat him. Then, defeat every Ghoul in Battle City. When Tristan reappears at your house, defeat him again. When Tristan says something about the park, go there, where Weevil Underwood would mostly be found. You will see Banid Keith attacking Weevil Underwood with Zera the Mant. Weevil Underwood will have no monsters, magic, or trap cards to protect his Life Points. Bandit Keith challenges you to a duel. When you defeat him, you will go to the building where Mokuba is located. He is wih Lumis and Umbra. You can choose who to duel against. When you defeat either one of them, go to the Art. This is where Seto Kaiba will be. Your map will now have the Pier where Marik Ishtar has Joey Wheeler and T'ea Gardner captive. Both are under the control of Marik' s Millennium Rod. Yugi will duel against controlled Joey Wheeler. Yugi does not want to duel against his best friend and falls in the water. You can either go in the water and rescue Yugi or leave him there. You will duel against controlled Joey Wheeler. When you defeat him, you will return to Yugi's house. While you are there, Joey needs one more Locator Card to finish in the Battle City finals. While you are waiting, go to the Art where Ishizu is waiting. She will duel against you. When you defeat her, you will face Seto Kaiba. After you defeat Seto Kaiba, Ishizu will give you Obelisk The Tormenter to use in the finals. Return to Yugi's house. Everyone is waiting for you. When you are near the blimp, talk to everyone. Then talk to Seto Kaiba's manager, who is guarding the blimp. Talk to him and one more minute before liftoff, Odion will appear and start the duels. You will see Yugi vs. Bakura. They both turn into the other one. Bakura Ryou turns into Yami Bakura and Yugi turns into Yami Yugi. Yugi summons Slifer The Sky Dragon and Yami Bakura loses.
Mako Tsunami
Go to the Clock Tower area bottom middle section (go to the clock itself then go down). There is a person there. Press [A] and he tells you that Arkana is in the card shop. Go there and when you defeat him the Aquarium, Bridge, and Building will appear as new areas. Mako is in the Aquarium. You have to duel all the people in there, including the person outside.
After defeating the Silent One/Strings, the Aquarium will appear. In order to battle Mako, defeat everyone inside and outside including Joey Wheeler. If Joey is not there, go to the building and talk to him. He should now be at the Aquarium. You will be able to duel Mako afterwards and receive the final locator card.
Obelisk The Tormentor
Duel Ishizu Ishtar, so she can see if you are the chosen one. After that, you have to face Kaiba to pass Ishizu's test. She will give you Obelisk to use in the Finals.
Obelisk The Tormentor has 4,000 ATK and 4,000 DEF. When he comes into play use his effect. He has a built in Raigeki, which can destroy all of the opponent's monsters. His second effect deals 4,000 of damage to your opponent's life points.
Slifer The Sky Dragon
Defeat Yugi in the Finals and he will give you Slifer.
Effect Slifer gains 10,000 ATK when you have four cards in your hand; three levels per a card in your hand
The Winged Dragon Of Ra
Defeat Yami Marik and finish the Finals.
When you defeat Yami Marik, he will give you The Winged Dragon of Ra but you cannot use it because the game has already ended. You can only use Obelisk The Tormenter, and Slifter The Sky Dragon.
When Ra comes into play, his effect is that every LP you use except for one will make the opponent lose LP defending on how much LP you have. For example, 8000-0001 = 7999 direct damage to the opponent
Using Ra
Duel Marik, allow him to summon Ra, but make sure you have Slifer on the field with a lot of attack (at least 5500) and a Monster Reborn in your hand. When Marik summons Ra, he will automatically put Ra in defense mode because your Slifer is stronger. Have Slifer attack and destroy Ra. After Ra is destroyed, immediately use Monster Reborn and you will be able to use Ra for the reminder of the duel.
Egyptian God card removal
When you Finish the finals, Ishizu will take all of the Egyptian God cards from you. Enjoy the God cards before the Finals.
Stop Defense effect
When you use "Stop Defense", all of your opponent's monsters well be in attack mode for two turns. This includes this turn and the next turn.
Reaching the Finals
To get to the Finals, you must have Obelisk The Tormenter, six Locator Cards, and at least a 3,000 Deck Capacity.
Winning the Finals
If you have already entered the ship, get off of it and save. Next, go to the pier, the graveyard, and the park to duel the duelists there. When your deck capacity has reached over 3,000, get back to the ship and duel Marik. Make sure you have either fiends or magicians. If that is not your style, use your own but make sure you have at least three copies of the field magic card that you are using. You should also have Obelisk and Slifer in your deck. Their cost is 0 each.
Dueling Kaiba
You will duel Kaiba at the Art place.
Dueling Mako
You will duel Mako by dueling everybody in and out of the Aquarium.
Defeating Bonz
Use a lot of Light monsters as Bonz's deck is totally filled with Fiend monsters. Light beats Fiend, Pyro beats Insect, and Aqua or Water beats Pyro.
Defeating Mako Tsunami
Use Thunder and Wind monsters. Thunder defeats all Aqua, and he has some Earth monsters. Use Wind against them.
Defeating Odion (Marik)
Use a lot of flying monsters such as Harpie Lady or Harpie Ladie Sisters. Do this because Odion has all Rock and Ground monsters. He really does not use trap cards like in other games and the television show.
Defeating Weevil
When dueling Weevil, his entire deck is full of Insects. Use Pyro Monsters against him. This even works with Pyro Monsters that have low attack points. Use Fire/Pryo Monster against him, even if they do not have ATK points.
Defeat Ghouls with purple cloaks
They use Fiends. If you use Light Monsters, you will defeat them easily.
Fight Marik again
Before you start dueling in the final match against the evil side of Marik, go back to your (player's) home and save your game. Afterwards, return to the Kaiba Tower and duel Marik. After winning the duel, the game will end. However if you want to duel Marik again, simply turn off the game and turn it back on. Select the option at the main menu to continue the game. Go to the Kaiba Tower to Marik and duel him again. Note: When you are using this trick, do not select "New Game" at the main menu or you will start a new game with or without saving. You can also do this with other duelists if you want duel him or her again.
Run very fast
Hold [B] while walking to run very fast.
Easy money
When you defeat Duel Robot you will get 5,000 Domino. If you defeat Duel Robot a lot, you can buy every card at the Card Shop.
When in the part with the Ghouls, fill your deck with light monsters. When they attack any of your face down monsters, they will automatically destroyed. You will now have a free shot at their life points. Try using Hourglass Of Life (raises all monsters attack on your side of the field by 500 points, no matter what type), Ancient Elf (strong light monster for powering up), Hoshiningen (powers up light monsters on your side of the field by 500 points), Gemini Elf (also a strong light monster), Skelengel (when using its effect, allows you to draw one card from your deck), and Revival Jam (can duplicate itself; with 1500 ATK points it is very useful). Try to get at least two of each of these cards into your deck. By doing this, you can get a lot of money easily. The Ghouls will give you 2,000 to 5,000 Domino in each duel (and you also get a card).
Duel Mako. He gives you cards such as Fortress Whale Amphibian Beast, and you will get 4,000 Domino when defeated. Use Revival Jam, Immortal Of Thunder, Rare Fish and similar cards that to defeat him.
Increase deck capacity
Battle Bonz at the cemetery for an easy win. You will get 10 points when you defeat him.
Opponent loses more LP
When you draw a level 5 or higher monster, play that card face down in defense mode with high DEF. Your opponent will attack your strong monster, then he or she will lose LP. If the attack power is not high enough, keep doing this every time. Your foe's LP will soon be gone.
Change your hand
To change your hand at the beginning of the duel, change your ante.
Ante cards
Ante cards are cards that the other duelist will take if you lose. If you "bet" a strong card and win, you will win a strong card. For example, a Magician Of Faith may get you a Curiboh. A Blue Eyes may get you a Dark Magician, etc. Save your game before a duel. Then, enter a duel, set your ante card, and if you lose, turn off your Game Boy Advance. Then, go back and try again. Note: Your Domino, duelist level, and your deck capacity will not change if you lose a duel.
Card shop
After you are done in Clock Tower you can reach the card shop. To get more Domino, increase duelist level and deck capacity duel Bonz ten times. Keep ante-ing to get more cards. After ten duels, sell the cards you do not need and you will get a lot of Domino. As you keep doing this, you will get a lot of deck capacity. As you win, your level will go up by 2 or 3. By the time you get to 4500 capacity, your level will be 999 and you can put any card in your deck. It is recommended that you maximize your capacity to 9999 so that you can make any deck desired not worrying cards that you cannot put in your deck. You should put more effect monsters such as Mythical Beast Circuit, Revival Jam, Dark Necrofear, etc,. in your deck.
Go to the machine at the card shop and enter the code "99267150". Buy the Five God Dragon at the front counter. Also, enter the code "62873545" to buy Master of Dragon Soldier at the front counter. You will need to sacrifice three monsters.
When buying, make sure that you buy a very strong card, probably after getting locator cards from Roba, Bonz, and Rex. Also, make sure to buy level 4 monsters with 1400+ or more instead of just buying a card with an attack of 900; you will save more money. Also, buy some trap and magic cards such as Raigeki, Torriental Tribute, Sword of Revealing Light, Monster Reborn, and Change of Heart
Summoning level 9 and above
Have three Doron and three Swords Of Revealing Light in your deck. Use Doron effect and it will make a clone of itself. Use it until you have what you need to summon it. For example, on the third turn summon the Egyptian God monsters (first turn two monsters Dorn's effect, second turn four Monsters, third turn one Doron God Monster).
Summon The Dark Sage and Thousand Dragon in one turn
Have both Dark Magician and Baby Dragon. Keep a Torrential Tribute face down to protect Baby Dragon. On your next turn, summon Time Wizard. It can make Dark Magican and Baby Dragon turn into an even more powerful form. Dark Sage has 2,800 and ATK 3,200 DEF. Thousand Dragon has 2,400 ATK and 2,000 DEF.
No ante
If do not want to give up an ante card during a duel, press [B] during the ante selection screen. Select "No" and you will battle without an ante.
Duelists that give you locator cards
Bonz
Rex Raptor
Wevil Underwood
Espa Roba
The Duelist that you get the final locator card from is Mako Tsunami.
Hint Getting good cards
The following people give good and semi-good cards.
Joey Wheeler (at aquarium)
Bonz (at graveyard)
Yugi (at toy shop)
Rex Rapter (at clock tower)
The Duel Machine (at Kaiba Corp.)
Weevil Underwood (at park)
Tsunami (at aquarium)
In the beginning of the game, battle Tristan repeatedly. You will get five deck capacity points and about 100 gold and a good card.
Go to Tristan (the person in front of your house) and use a high level card as an ante. When you defeat him you will get very good cards.
Recommended cards
Try having at least three of the following cards in a deck: Doron, Revival Jam, Swords Of Revealing Light, Mammoth Grave Yard, Spellbinding Circle, Pot Of Greed, Pinch Hopper, Insect Queen, Destiny Board, Spirit Message I, Spirit Message N, Spirit Message A, Spirit Message L, Raigeki, Dark Hole, Exodia The Forbidden One, Left Arm OF The Forbidden One, Right Arm OF The Forbidden One, Left Leg Of The Forbidden, Right Leg Of The Forbidden One.
Easy way to remember what beats what
There are two circles; the Element circle and the Day/Night circle. In the Elemental circle, there are Pyro, Aqua, Forest, Thunder, Wind, and Earth. In that, Pyro beats Forest, Aqua beats Pyro, Thunder beats Aqua, Earth beats Thunder, Wind beats Ground. and Forest beats Wind. The Day/Night circle has Light, Shadow, Dream, and Fiend. Fiend beats Dream, Dream beats Shadow, Shadow beats Light, and Light beats Fiends.
Monsters that can clone themselves
Doron and Revivel Jam can clone themselves. Use their effects to make copies of themselves, then summon level 6 and above, and also have a very high deck capacity (at least 4000) and 4000 duelist level. By that time your deck will be unbeatable.
Weaknesses
Wind defeats Earth.
Earth defeats Thunder.
Thunder defeats Aqua.
Aqua defeats Pyro
Pyro defeats Forest.
Forest defeats Wind.
Shadow defeats Light.
Light defeats Fiend.
Fiend defeats Dream.
Dream defeats Shadow.
Order of Finals battles
1. Yugi vs. Bakura
2. You vs. Odion
3. Marik vs. Joey Wheeler
4. Kaiba vs. Mai Valentine
5. You vs. Yugi
6. Marik vs. Kaiba
7. You vs. Marik
Ending and credits
When you, Yugi, and Joey go back to Battle City and say goodbye to each other, credits will appear, along with character art. Note: To know when credits end, when Yami Yugi appears with a duel disc in his arm, in the bottom left corner it will say "The End".