Revealing mistake: After Yugi turns into the Pharaoh, he says, "I have just one thing to say to you, Paradox: it's time to duel," and then it cuts to a shot of the three main characters. In this shot, the designs on the Millennium Puzzle are missing. (00:31:58)
Revealing mistake: When Sera is explaining to Yugi why she gave him the puzzle piece, in the shot where she says "He's giving in to fear and anger," Yugi is supposed to be looking at her, but his eyes do not appear to be aligned with her face. He is looking straight forwards instead of downwards. (01:12:55)