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)
Yu-Gi-Oh! (1998)
1 character mistake in The Heart of the Cards - chronological order
Starring: Eric Stuart, Amy Birnbaum, Dan Green, Darren Dunstan
Genres: Action, Adventure, Animated, Family, Fantasy, Thriller
The Tomb-Keeper's Secret - S2-E46
Revealing mistake: Whilst discussing Marik with Ishizu, there is a wide shot of the bedroom where Joey says, "What if it's too late to save Marik from the evil that's inside of him?" In this shot, there is an animation error with Serenity's head. Serenity has her head turned to face Ishizu, but the turned head appears to have been poorly pasted over another version of Serenity's head that is facing directly forwards. (00:04:44)
Seto Kaiba: I'm surrounded by superstitious nitwits.