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
Starring: Eric Stuart, Amy Birnbaum, Dan Green, Darren Dunstan
Genres: Action, Adventure, Animated, Family, Fantasy, Thriller
Winning Through Intimidation - S1-E15
Continuity mistake: Panik's Metal Guardian can be seen on the field several minutes before he actually plays it. (00:10:30 - 00:13:00)
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.