Zeb

Zeb was a zebra who worked under Arabus as the manager for Knightshade and the Shadowettes. He lured and manipulated Baby Ponies into coming into Knightshdow's trailer in order for their shadows to be sucked out of them.

Behind the scenes
Zeb is a rather loaded character. Despite being a single, one-off villain, and a secondary one at that.

First of all, Zeb was one of the two only Zebra characters to ever appear in Generation 1, the other being Zig Zag, who only appeared in merchandise, though it's unclear who came first as both the toyline featuring Zig Zag, Pony Friends, and the episode Zeb appeared in, both came out around the same time. Notably, there wouldn't be another zebra character until 2010 with the introduction of Zecora, and not a single look into Zebra culture until 2020 with Friendship is Magic: Season 10.

Secondly, Zeb's, Knightshade's, and Arabus's nature is far darker then most villains in the franchise. Yes, while their ultimate goals are inline with the whimsically dark nature of the series, it doesn't take much to realize the real-world parallels between them and the very real crime of the trafficking of children. Zeb and Arabus are, at the core of their actions, using a marketable and popular icon in the form of Knightshade in order to manipulate the innocence of little kids to lure them away from their guardians and abuse them.

Voice actors
Zeb's actor in the was unaccredited. In the Polish dub, he was voiced by Jacek Czyż, and in the Finnish dub, he was likely voiced by a member of Golden Voice Oy or Agapio Racing Team.