The Heart of the Cards - S1-E1
Revealing mistake: When Yugi and Joey are duelling at the start, in the shot of Tristan approaching Joey, the cards that Yugi is holding appear to be drawn incorrectly. The cards don't have the text or illustrations that are usually shown on them. (00:01:46)
The Heart of the Cards - S1-E1
Revealing mistake: When Kaiba shows Solomon the briefcase full of cards, there is one card with 1600 attack points and 1800 defence points. The defence points of the card appear to be a lot lighter than the card's attack points, as well as the attack and defence points of the other cards. (00:04:52)
The Heart of the Cards - S1-E1
Continuity mistake: When the KaibaCorp thugs walk into the card shop, there is a close-up of Solomon where we can see his face is half-covered in sunlight. Then it cuts to the head thug speaking to him, but when it cuts to Solomon saying "and if I were to decline," he is entirely shadowed. (00:06:10)
The Heart of the Cards - S1-E1
Continuity mistake: When Kaiba holds up the Blue Eyes White Dragon card he took from Solomon, in the shot of him raising the card, he has two fingers pressed against the front side of it. In a close-up of the card, he is holding it with three fingers, and the fingers are at a different angle. (00:07:46)
The Heart of the Cards - S1-E1
Character mistake: When the duel begins, Kaiba says, "I attack with the Hitotsu-Me Giant," but once the monster is summoned, he doesn't attack Yugi with it. (00:10:20)
The Heart of the Cards - S1-E1
Continuity mistake: When Kaiba summons his first Blue-Eyes White Dragon to the field, Joey says, "Impossible. We all watched Kaiba tear that card in half." At this moment, his arms are straight. When the shot cuts, his arms are bent. (00:13:37)
The Heart of the Cards - S1-E1
Continuity mistake: When Solomon wakes up in the hospital after the duel, the elastic string attached to his oxygen mask is at a straight angle. In the next shot, the elastic string is at a tilted angle. (00:19:08)
The Gauntlet Is Thrown - S1-E2
Character mistake: When Pegasus shows Yugi the Faceless Mage card, Yugi says, "But my Dark Magician is one of the strongest magic cards in the game." Dark Magician is a monster card, not a magic card. (00:16:50)
Journey to the Duelist Kingdom - S1-E3
Continuity mistake: When Yugi opens the envelope with the invitation to the duelling competition, his left thumb changes position between shots. (00:03:40)
Into the Hornet's Nest - S1-E4
Continuity mistake: When the main characters are on the harbour at the start, after Tristan says he almost had a heart attack, in the wide shot, Tea is facing Tristan, but in the next shot, she is facing Joey. (00:02:45)
Into the Hornet's Nest - S1-E4
Continuity mistake: When Pegasus is welcoming everyone to the tournament, Yugi looks at his deck. In the shot of him raising the deck, the bottom side of the cards is facing the palm of his hand. But in a close-up of the cards, the bottom side of the cards is facing away from the palm of his hand. (00:05:44)
The Ultimate Great Moth - S1-E5
Continuity mistake: When Tea says, "Well, Mai, from the look on Yugi's face, I'd say having friends just did help him out. So there," her hands are level with her chest. When the shot cuts, her hands are raised and next to her ears while she sticks her tongue out at Mia. (00:10:05)
The Ultimate Great Moth - S1-E5
Continuity mistake: When Tea tells Mai to get lost, Joey's right hand cannot be seen in front of his chest. The shot then cuts to a side view of Joey, where his right hand can be seen in front of his chest. (00:16:25)
Continuity mistake: When Joey is celebrating getting his second star, in a close-up of his shoes, there is a shadow between his two feet. Three shots after this, the shadow has disappeared. (00:01:03)
Continuity mistake: When the fisherman is berating Joey and Tristan for eating his fish, his left fist is pointed upwards. When the shot cuts, his left fist is pointed downwards. The spear he is holding also changes direction. (00:03:12)
Other mistake: When Mako Tsunami is eating the fish, it remains intact whilst being eaten. He raises the fish to his mouth and is shown eating, but no bite marks are shown on the fish. (00:04:49)
Continuity mistake: When Mako Tsunami says, "I treated you to dinner, perhaps you will honour me with a duel," Joey says, "he's nuts." At this moment, Joey is in front of Yugi, and Yugi is in front of Tea and Tristan. In the next wide shot, Yugi, Joey, and Tea are side by side, and Tristan is behind them. (00:06:03)
Continuity mistake: When the duel starts, Mako Tsunami summons a monster card to the field. In the shot of him placing the card on the game table, it is face down. But in a close-up of the table, it is face up. (00:07:45)
Continuity mistake: When the guard approaches the cell, he is rolling a trolley with food and drinks on it. There is a kettle on the trolley with the spout facing towards the door. In the next shot, when the guard walks into the cell, the kettle has now rotated 90 degrees in between shots. There are also two plates on the trolley that are beside the kettle, but change to being behind the kettle when the shot cuts. (00:01:42)
Continuity mistake: When the guard comes into the cell, he sees the rope made out of bedsheets, going out the window. From the interior shot, the bedsheets are in the corner of the window frame. From the exterior shot, the bedsheets are nearer to the middle of the window frame. (00:01:46)
