Mr. Ryuga

Ryuga (龍牙 Ryūga) is a minor character exclusive to the Manga of Yu-Gi-Oh! GX. He is a teacher trainee assigned to duel fifty students. On the condition that he could pass them all, he would be recognized as an official professor of Duel Academy. He is rumored to take the cards of those he defeats. When he duels, he uses a special ring to emit an electromagnetic force that disables his opponent's Duel Disk, preventing their use of Spell Cards. He challenges Jaden, but the duelist defeats Ryuga with his Trap-Fusion card.

Dueling Cards
Ryuga uses a Dinosaur Deck:

Monster Cards

 * Cyber Dinosaur
 * Don Turtle
 * Hyper Hammerhead

Spell Cards

 * Ultra Evolution Pill
 * Smashing Ground