Yu-Gi-Oh! GX Season 1 Episode 95

Syrus challenges his broher to a duel, hopefully to bring him back to normal. Zane accepts the challenge and the duel between the brothers begins. Syrus remembers what his brother had taught him about respecting the opponent. However, Zane forgets all he once knew,and taught to his brother, and attacks Syrus using his unique Cyber Tail Deck.