Hint: Limited Tournament cards:

Week 1: Level 5 and up Monsters, Tea
Week 2: Equip Spells, Tristian
Week 3: Dark Monsters, Bakura
Week 4: Wind Monsters, Mai
Week 5: Traps, Joey
Week 6: Effect Monsters, Yugi
Week 7: Spells, Seto

Grandpa:
Press L, Right + B, Right, B, R, Left, Down, A at the title screen (where the number of players is selected). Note: Do not enter the code too quickly.

Kaibaman:
Press Down, B, Left, Right(2), R, Up + R, A at the title screen (where the number of players is selected). Note: Do not enter the code too quickly.

Yami Bakura:
Press L, Down, Right, Left + B, R, Down(2), A at the title screen (where the number of players is selected). Note: Do not enter the code too quickly.

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