Revealing mistake: When the main characters are in the other dimension, they are shown walking on sand quite a lot, but they never make any footprints when walking across it.
Inter-Dimension Detention - S3-E16
Revealing mistake: When Chazz says Jaden can have his bed, a weird animation error occurs regarding the bed. There is a white bedsheet that covers the mattress, and a small shadow can be seen underneath the pillow and duvet. When he starts to get up, the bedsheet momentarily switches to the colour of the shadow midway through the shot. (00:06:10)
Revealing mistake: Just after Crowler asks himself why all the important decisions fall on his shoulders, the shot cuts to Syrus, Alexis and Hassleberry. Hassleberry says "What'd you talk yourself into doing, Professor" and puts his hands on his hips. When he does so, his left hand passes through his trouser leg. (00:04:14)
The Night of the Living Duelists - S3-E18
Revealing mistake: When the Duel Ghouls are approaching the main characters, in the shot where Chazz walks to the front of the crowd, there are three ghouls who are drawn black, with no facial features or clothing, to give off the impression that they are shadowed. (00:16:00)
The Night of the Living Duelists - S3-E18
Revealing mistake: When everyone is running into the locker room through the doorway, the first aid kit held by Jesse appears to clip through the door frame when this happens. (00:17:06)
Revealing mistake: When Miss Fontaine is trying to contact Jaden, after she says "Please hurry", it cuts to a closer shot of her where she sighs. When this happens, she lifts the communication device up and down slightly. There is a small part of the device that is shadowed, but she moves slightly, the shadow suddenly vanishes. It doesn't fade away; it just blinks out of existence. (00:00:23)
Revealing mistake: When Pegasus has finished designing the Rainbow Dragon card, Chancellor Shepherd and a group of background extras start applauding. There is one extra wearing a lab coat standing behind Shepherd with black hair, who is reused in the same shot when it pans over to another group of extras on the opposite side of the site. (00:03:20)
Unleash the Dragon: Part 2 - S3-E26
Revealing mistake: When Marcel activates Dimension Fusion Destruction, whilst explaining that by removing the three Sacred Beasts from play, he can summon a new monster, there is a shot of him saying "I can summon Chaos Phantasm Armityle." Right at the start of this shot, a minor animation error occurs where part of his hair suddenly becomes more shadowed partway into the shot. (00:14:25)
The Forbidden Ritual: Part 1 - S3-E40
Revealing mistake: Aster activates the ability of Destiny Hero Dunker, allowing him to send one Destiny Hero monster to his graveyard so that Adrian loses 500 life points. In the shot of the monster being placed into the slot where cards are sent to the graveyard, the bottom of the card is partially laid over the circular light on his duel disk beneath the slot. Despite this, the card remains completely straight and doesn't bend when placed over the light. (00:14:57)
Return of the Supreme King: Part 3 - S3-E51
Revealing mistake: After Yubel's life points go down to 400, she tells Jaden should he win, they will protect him. The shot after Jaden says "Protect me?", it cuts back to Yubel saying she has always tried to shelter him from harm. In this shot, the purple mark on her face cannot be seen and it is then suddenly animated onto her face midway through the shot. (00:11:37)
