Brothers in Arms: Part 2 - S3-E18
Revealing mistake: When Joey asks, "What kind of freak picks a giant boat to be his deck master?", the cards that Noah is holding in his hand are missing the illustrations. (00:01:47)
Yu-Gi-Oh! (1998)
1 revealing mistake in Brothers in Arms: Part 2
Starring: Eric Stuart, Amy Birnbaum, Dan Green, Darren Dunstan
Genres: Action, Adventure, Animated, Family, Fantasy, Thriller
Duel Identity, Part II - S1-E30
Character mistake: Yugi mistakenly says if he doesn't get a monster out to defend himself Mai can attack him directly, which wouldn't be possible since the rules of Duel Monsters during the Duelist Kingdom arc forbade direct attacks on defenseless opponents. That rule wouldn't be implemented until the Battle City arc.
Seto Kaiba: I'm surrounded by superstitious nitwits.