Other mistake: When Marik activates the spell card Pot of Greed, in the shot of him inserting the card into the spell/trap card slot, another version of the card can be seen in the monster card zone on his duel disk, even though it shouldn't be there. (00:06:30)
Other mistake: Marik summons Slifer the Sky Dragon, which is featured on his side of the field for the entirety of the episode, but whenever his duel disk is shown, the Slifer the Sky Dragon card cannot be seen on it. Instead, there is just a spell card, which shouldn't be there, because spell cards are inserted into slots on the duel disk and are not placed in the monster card zone.
