Yu Gi Oh! Dawn of Destiny

Xbox

Cloned Deck:
Beat the game. After that go to a duelist then press X on him/her. Then let go of X and do it to that person again. Duel him/her and you'll be using thier deck.

Random rare card:
Enter the name GOD OF CARDS.

Cosmo Queen:
Enter the name KONAMI.

Zera the Mant:
Enter the name XBOX.

Random Rare Card:
Enter the name GOD OF CARDS.

Thanks to Revolution readers Wantanamerra, Richard McDonald and Soua Yang!