Fairly certain this mob doesn't belong in classic Kunark. I found him up in the hallway in Kurn's Tower, down a bit from where the Skeletal Jester should spawn. I camped the jester for a good long while on live, and never encountered this mob before.
http://eqbeastiary.allakhazam.com/search.html?id=13492
The earliest post here is from 2004.
edit: Undead Jester. Shows what my memory is worth, I guess.