Plot hole: After discovering the cards tossed into the ocean at the docks, Miss Dorothy goes to Jaden's dorm to alert him of this. There was no real reason for her to go to him, seeing as how she had no idea if this incident was tied to him specifically. (00:09:05)
Plot hole: Bastion uses the special ability of Hydrogeddon, where he is able to summon another Hydrogeddon from his deck. He summons this monster by drawing the first card from the top of his deck, but there would have been no way for him to know if the card on top of his deck was a Hydrogeddon card. (00:12:35)
Monkey See, Monkey Duel - S1-E13
Continuity mistake: After Jaden summons Sparkman to the field and says "Monkey see, monkey do", the shot cuts to Wheeler, before panning over to Jasmine lying on the tree. When the shot cuts to a closer angle of Jasmine, her right hand is suddenly touching onto a branch, even though it wasn't in the previous shot. (00:08:49)
Continuity mistake: Whilst everyone is waiting for the sandwich thief to arrive, Jaden and Syrus are playing cards. After Jaden correctly guesses Syrus' card, Syrus says "Picking cards, drawing cards, amazing", and has his right hand ahead of his left hand. When the shot cuts, his left hand is suddenly ahead of his right hand. (00:03:07)
Plot hole: To escape from the students chasing after him, Damon jumps from a high ledge in the Duel Academy building and lands in the forest. Then he swings across vines at great speed, but somehow, the students all end up ahead of him in the forest, even though they were walking on foot. (00:05:30)
Character mistake: Jaden tells Damon that because of Elemental Hero Flame Wingman's ability, he will lose life points equal to half his destroyed monster's attack points. This is incorrect, as Damon will actually lose life points equal to the full attack points of the destroyed monster. He has used this card multiple times throughout the series, so this isn't a mistake he should have made. (00:18:25)
The King of the Copycats: Part 1 - S1-E18
Continuity mistake: When Jaden, Bastion and Chumley regroup after searching for the card thief, in the wide shot, Bastion is standing 45° perpendicular to Jaden. In the next shot, Bastion is suddenly 90° perpendicular to Jaden. (00:09:20)
The King of the Copycats: Part 1 - S1-E18
Continuity mistake: After Dimitri has beaten Syrus with Yugi's deck, there is a shot where he says "It's good to be the King of Games", he has his right hand scrunched into a fist. When the shot cuts, his right hand is suddenly free and not making a fist. (00:09:33)
Continuity mistake: When Jaden starts climbing up the tree to follow Blair into the Obelisk Blue dorm, in the first shot of him climbing the tree, the branch leading toward the balcony is only a few feet long. Then there is a quick fade edit, and the branch is suddenly much longer. (00:03:52)
Continuity mistake: When the hairclip falls out of Blair's hair, it lands on the floor. Next to it is a spell card lying against the side of Zane's bed. Later in the scene, when Zane looks at the hairclip on the floor, the card next to the bed has disappeared. (00:04:40 - 00:05:27)
Continuity mistake: After Jaden realises Blair is a girl, there is a shot of Zane's room from above where Blair starts to run away. In this shot, some of Zane's cards can be seen on the floor after they were dropped. A couple seconds later, when Zane looks at the floor, the cards are now in different positions. (00:04:47)
Continuity mistake: After Jaden leaves the Obelisk Blue dorm, he says "What until I tell the guys about this", and Blair pops up her head up from some bushes she was hiding behind. The shot then cuts to a closer shot of Blair, and the bushes around her have changed shape. (00:05:58)
Continuity mistake: When Zane hands the hairclip back to Blair after the duel, he places it in her right hand. In the next shot, she is holding it with both hands. (00:18:08)
Other mistake: When Jaden switches Oxygeddon to Defence Mode after using Spark Blaster, a display appears which shows the monster's defence points. However, the word ATK (meaning attack points) is shown on the display, even though it should read DEF (defence points) as the monster is currently in Defence Mode. (00:14:56)
Continuity mistake: After Crowler has thrown the chickens into the other vault, there are chicken feathers spread out on the floor beneath him. Two shots later, the feathers are suddenly closer together. (00:00:57)
Continuity mistake: After Bastion tells Jaden duelling is about being the best you can, there is a close-up of him raising his Water Dragon card to him, which is followed by Syrus raising his Power Bond card to him. In this shot, Syrus has his thumb placed over the front of the card. But in the next shot, his thumb is along the side of the card. (00:03:38)
Continuity mistake: After Belowski introduces himself to Jaden, Winged Kuriboh comes out of Jaden's deck. When this happens, Jaden's left hand is away from his knee, but when the shot cuts, his left hand is suddenly placed on his knee. (00:04:33)
Continuity mistake: When Chazz's brothers are speaking with him in the locker room, in the shot where one brother says "Now it's your turn, bro", there is a yellow bag and blue bag shown in the background. The yellow bag has one strap sticking upwards, and one strap bent to the side, but two shots later, both straps on the yellow bag are sticking upwards. (00:05:13)
Continuity mistake: When Jaden is watching Chazz give himself the prep talk in front of the bathroom sink before the duel, in a shot shown from above, there is a blue tile and a green tile shown on the top right-hand side of the mirror he is standing in front of. Two shots later, the tiles are suddenly further down the wall. (00:06:25)
Other mistake: When Jaden has Elemental Hero Wildheart attack Chazz directly, Chazz's life points go down to 2100. Chazz's life point count remains this way for a large chunk of the duel, but when Elemental Hero Flame Wingman destroys Armed Dragon LV7, Chazz's life point count is 2800. Technically speaking, Chazz does lose the correct number of life points since his go down to 1600 and there was a 500-point difference between the two monsters, but his life points shouldn't have been listed as 2800. (00:05:44 - 00:15:15)
