Ghoul

Ghoul was one of the Jokerz who followed the rejuvenated Joker. He was heavily into techno-goth music and has adapted the horror look into his costume. Ghoul was never without his plastic Halloween pumpkin which he kept filled with a number of monster-inspired weapons and tricks.

History
Stewart Winthrop was born into a wealthy family. He wet his bed until he was 14, and ran away shortly after to join the Jokerz for kicks. He joined a sub-gang of the Jokerz before the group soon fell under the control of the Joker. He served as the group's techie, manning the computers and technical equipment. He was usually paired up with Woof before the police arrested the gang.

Alternate Future
In the alternate future created by Chronos, he was upgraded to have a robotic buzz saw implated in place of his arm, and was shown to be able to retract that and swap between his arm and the buzz saw.

Background Information
Ghoul is a very loose tribute to original Batman villain Scarecrow. Interestingly, while most of the original Batman villains who are referred to in Batman Beyond are referenced to the way (or somewhat similar) they appeared in the revamp, Ghoul's costume actually bears more resemblance to how the Scarecrow appeared before the revamp.

Much like his Kevin Spacey impression that formed the basis of Deadshot's voice performance, Michael Rosenbaum based the voice of Ghoul on actor Christopher Walken. Both Spacey and Walken have played a DC Comics villain, with Spacey portraying Lex Luthor in Superman Returns and Walken portraying Max Shreck in Batman Returns.

Abilities & Equipment
Ghoul is not much of a physical fighter, virtually always being the easiest member of the gang Batman has beaten (usually with one punch). He does seem to have a vast knowledge of technology, as he was able to locate equipment for The Joker's plan. With his upgrades in an alternate future, he was considerably much more of a threat although he was still brought down easily when confronted by the League.

Feature Film
Batman Beyond: Return of the Joker

Justice League Unlimited
"The Once and Future Thing Part One: Weird Western Tales" "The Once and Future Thing Part Two: Time, Warped"