Yu-Gi-Oh! Ultimate Masters – World Championship Tournament 2 – Platform: Gameboy Advance

Unlockable: Batteryman C:
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You have to beat all of Tier 1 Monsters once.

Unlockable: Dark Eradicator Warlock and Guardian Exode:
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You have to beat all of Tier 3 Monsters three times.

Unlockable: Des Frog and Water Dragon:
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You have to beat all of Tier 1 Monsters five times.