Yu-Gi-Oh! Falsebound Kingdom - Platform: Gamecube

Unlock Soul of Oblisk: 
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To unlock the Soul of Oblisk, beat Yugi's story. 

Get Obelisk The Tormenter:
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To get Obelisk the Tormenter, beat story mode once with Yugi Moto. 
He should appear as an item that you can summon once a round. 

Konami Code Hijinks:
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Go to any empty space and press the Konami Code: UP, UP, DOWN, DOWN, 
LEFT, RIGHT, LEFT, RIGHT, B, A, and you'll hear a jokey sound. 

Unlock Alpha Warrior:
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On DREAM WORLD liberate MEMORY BRIDGE in the Yugi story. 

Unlock Black Luster Soldier:
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When you get the Black Luster Ritual use it on Gaia instead on the Dark 
Magician to get the Black Luster Soldier. 

Unlock Eye of Ra:
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To unlock the Eye of Ra, beat Marik while playing as Joey. 

Get the Magician of Black Chaos:
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To get the Magician of Black Chaos, use the black luster ritual on the 
dark magician. 

Unlock Joey:
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Win the story mode with both Yugi and Kaiba to unlock Joey. 

Unlock Silfer's Orb:
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To unlock Silfer's Orb, beat Kaiba's game. 

Busterblader:
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In Kaibas level Dragon'slair use z to send someone to Den and on the 
mountian you will find a busterblader and a cyber commander beat them 
and you will get them both.

Challenge Mode:
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Defeat everyone at least once. When you go to 'Load Game', there will be a 
challenge mode with all of your items from the three stories.

Completing Challenge Mode:
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Have Dark Magician, Dark Magician Girl, and Dark Magician #2. Level them up 
so that the Dark Magicians can use Dark Burning Magic. Equip Rageki and Mirror 
Force and Red Medicine or a Dien Keto Cure Master. You should not have a problem 
with challenge mode.