Yu-Gi-Oh! (1998)

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.

Joey Wheeler, Shadi: Go, Drumsticks.
Mai Valentine: Uh, guys? Joey named his chicken.
Joey Wheeler, Shadi: It's a Nematory, Mai.
Mai Valentine: Whatever.