Yu-Gi-Oh! (1998)
0 continuity mistakes in show generally - chronological order
Starring: Eric Stuart, Amy Birnbaum, Dan Green, Darren Dunstan
Genres: Action, Adventure, Animated, Family, Fantasy, Thriller
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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.
Mai Valentine: Hey! Cross on the green, not in between.
Duke Devlin, Raphael, Valon: Sorry, but we're being chased by a bunch of robed weirdos.