Sadler is the main antagonist of Street Fighter Alpha: The Animation. An enigmatic man who attempts to take over Shadaloo in M. Bison's mysterious absence (in this continuity, Bison is not shown), his goal is to become the greatest fighter ever by stealing fighting Ki (or "data") from various Street Fighters all over the world, and is not above killing innocent people to achieve this.
Biography
Sadler learns of a fighter named Ryu who defeated the Muay Thai champion, Sagat, and becomes fascinated with Ryu's potential, particularly his connection to the Dark Hadou. In order to get this power, Sadler employs a young boy named Shun to meet Ryu and pose as his younger brother. With help from his android enforcer, Rosanov, Sadler stages a kidnapping of Shun so as to lure Ryu to his hideout. The plan works, and Ryu brings Ken, Chun-Li, Dhalsim, Dan, Birdie, Adon, Sodom, Guy and Rolento to help him.
Sadler has the fighters fight each other, and selects Birdie for the "prize", having his men lure him into the hideout and place him inside a machine to strip him of his fighting Ki. Ken and Chun-Li get wind of this upon seeing Sadler's personal victims, and rush inside to free the other fighters. Sadler orders Rosanov to absorb Shun, beat up the fighters and fight Ryu, goading him into succumbing to the Dark Hadou, all the while having Rosanov connected to a machine which will feed Sadler's body with Ki every time Ryu hits Rosanov. Finally, Ryu loses control of his anger and strikes Rosanov with a dark Hadouken, destroying him and freeing Shun.
With his power skyrocketing, Sadler emerges from his facility and fights Ryu head on, easily gaining the upper hand. However, with help from Ken, Ryu manages to survive Sadler's attacks and blasts the mad scientist with a Shinku Hadouken. The attack leaves Sadler badly damaged, and before he can openly wonder how Ryu's power can still be superior to his, Sadler crumbles into dust and perishes.
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