Drayden

Shaga is the 8th Gym Leader of Souryuu City, In Pokemon Black. While Iris is the 8th Gym leader in Pokemon White version. His Gym Leader title implies that he may be the mayor of Souryuu City

Trivia

 * Shaga resembles the White legendary Pokemon Reshiram, while Iris resembles the Black legendary Zekrom.
 * In Pokemon Black version Shaga is th 8th Gym leader while in Pokemon White version Iris is 8th Gym leader.