Unlock Joey Weeler:
Finish the game as Kaiba and Yugi.
Get more gold coins:
During a mission while you are on an empty piece of land, enter the Konami code:
Press Up, Up, Down, Down, Left, Right, Left, Right, B, A
If the code is accepted, you should hear a laugh and somebody will say: "Yu-yu"
Repeat as many times you want.
Unlock Winged Dragon Of Ra: Finish the game with Joey.
Unlock Soul Of Obelisk: Finish the game with Yugi.
Unlock Slifer's Orb: Finish the game with Kaiba.
Unlock Magician of Black Chaos: Use Black Luster Ritual on Dark Magician.
Unlock Black Luster Soldier: Use Black Luster Ritual on Gaia the Fierce Knight.
Unlock Black Luster Ritual: Beat the Shadi who has Black Luster Ritual.
Fusions:
Thousand Dragon = Time Wizard = Baby Dragon
Twin Headed Thunder Dragon = Thunder Dragon + Two Headed King Rex
Skull Dragon = Red Eyes Black Dragon + Summoned Skull
Blue Eyes Ultimate Dragon = Blue Eyes White Dragon X3
Crimson Sunbird = Mavelus + Faith Bird
Gaia The Dragon Champion = Gaia The Fierce Knight + Curse of Dragon
Gate Guardian = Sanga of the Thunder + Suijin + Kazejin
Illusionary Beast = Gazelle + Berrformet
Magician Of Black Chaos = Dark Magician + Chaos Ritual
Magnet Valkyrion = 3 Magnet Warriors
Meteor B. Dragon = Red Eyes Black Dragon + Meteor Dragon
Rabid Horsemen = Mystic Horsemen + Battle Ox
