Trapper Keeper: Part 1 - S3-E11
Character mistake: When Jesse is explaining Crystal Beast Amethyst Cat's ability to Trapper, he says "When I give up half my life points, you'll see what I mean." Amethyst Cat's ability allows it to attack an opponent directly by giving up half of its attack points, so Jesse was incorrect in saying he would be giving up half his life points. (00:10:30)
Breaking of the Sacred Seal - S3-E23
Character mistake: When Marcel activates his two face-down cards, he says "I'll start by revealing my two face-down cards which both happen to be Break the Seal spell cards", but they are trap cards as they are pink and spell cards are green. (00:15:10)
Character mistake: On Jaden's first turn, he considers fusing his Bubbleman and Clayman to summon Elemental Hero Mudballman because "he'd have enough attack points to take down the Sky Scouts' Simorgh." This is not true, as Mudballman has 1900 attack points and Simorgh has 2700 attack points. (00:10:57)
The Forbidden Ritual: Part 1 - S3-E40
Character mistake: Aster uses his Diamond Dude's ability to activate Destiny Draw from his graveyard, allowing him draws two cards from his deck. After doing this he then refers to Destiny Hero Diamond Dude as Destiny Dude instead of Diamond Dude. (00:14:30)
The Forbidden Ritual: Part 1 - S3-E40
Character mistake: When Aster attempts to attack Adrian with his Destiny Hero Dread Master, Adrian activates a face-down card Dimensional Prison, to which Aster replies "Great, a Counter Trap", however, this card is actually a Normal Trap card. (00:17:05)
Conquering the Past: Part 1 - S3-E42
Character mistake: Just after Zane destroys Jaden's Spark Blaster, he says "You were too afraid to fuse your Sparkman with your Spark Blaster last turn", however he used the wrong wording. "Fuse" means to combine two monster cards into one Fusion monster. He meant to say "equip" as equip spell cards like Spark Blaster are equipped to monster cards like Sparkman. (00:06:52)
Conquering the Past: Part 1 - S3-E42
Character mistake: When Zane destroys Jaden's Hero Barrier card with the effect of his Armoured Cybern, he says "Why wouldn't you play that spell?", but Hero Barrier is a trap card. (00:07:08)
Conquering the Past: Part 1 - S3-E42
Character mistake: When Zane destroys one of Jaden's face-down cards, which is then revealed to be E - Emergency Call, he says "That was the trap, Emergency Call." However, E - Emergency Call is a spell card, not a trap card. (00:07:33)