Yugi's Grandpa: 65437205 

Every time you win a match yugis grandpa gives you an extra card.

View Credits: 42382443

Self explanatori.


For the following codes You have to have beaten the game at least once.

Face Nitemare: 43504084

Face Marik: 06987398

Face Yami Yugi: 70715281

Face Yami Bakura: 07119986

Face Shadi: 70592699