Skeleton Warrior

DnD

The Skeleton Warrior was a short-lived creature in the days of Advanced Dungeons & Dragons, appearing in the Fiend Folio. Created to make up for the fact that monsters couldn't "level up" the way adventurers could in those days, the Skeleton Warrior exists to keep the skeleton relevant for longer.

Fluff-wise, a Skeleton Warrior is an undead Fighter of considerable level, brought back from the dead as an intelligent, self-aware skeletal undead by an evil necromancer or demigod, who controls them by trapping their soul in a golden circlet. This circlet can be used to control the Skeleton Warrior, but it will always be watching for a chance to turn on its master and kill them; only by obtaining the circlet can the Skeleton Warrior's soul be released to the afterlife.

Standing as an interim step between skeleton and Death Knight, Skeleton Warriors are extremely tough. Their weapons hit as if they were +3 weapons, they are immune to non-magical weapons themselves, and they have a 90% resistance to magic spells. They exude an aura of fear that causes any creature with less than 5 hit dice to flee at the sight of them, and they are immune to clerical turning effects.

The Skeleton Warrior's legacy lives on mostly in the Skeletal Champion template for Pathfinder.

A skeleton warrior named Dekion appeared in an early episode of the D&D Cartoon.

There was also a Science Fantasy cartoon series in the early 90s (when else?) called "Skeleton Warriors" and it was metal as fuck, with heroic knights battling a band of evil warriors who had attempted to seize a magical artifact, only to be transformed into ghastly living skeletons with dark magical powers. Like most 80s-to-mid-90s toons, it had an awesome theme song. You can check it out here.

Warhammer Fantasy Battles

For the various necromancers of the Old World, skeleton warriors are the typical front-line troops for most of your armies. With the exception of the Vampirates, who are almost entirely zombies. All other Undead factions typically use the skeleton warriors or their more elite counterparts. Mostly because it's easier to get long dead people than recently dead people in the form of zombies, and because skeletons don't have any of the residual personality left like mummies do. (With the exception of Dwarf skeletons who are as stubborn in death as they are in life, leading to many a poor necromancer dying at the hands of pissed of skeleton dwarf slayers.)

As you would expect, the Grumpy mummies and the Hot-topic fans use them differently due to the different areas of the world they inhabit.

The End Times made it so both versions could be taken in the same army, the Undead Legion.

Vampire Coast

The Vampire Coast surprisingly doesn't use skeletons, and instead focuses almost entirely on zombies. It's likely the mix of ship-wrecked sailors, washed up bodies, and people caught in a very bad raid mean that they typically don't get things who have been dead for long, especially with the various predators and scavengers of Lustria and the sea eating anything that won't put up a fight. Additionally, corpses will float, whereas skeletons typically sink to the bottom of the sea, which, as you would expect, would make it hard for an entrepreneurial Vampire to get his hands on, due to the unknown eldritch horrors that lay at the bottom of the Warhammer World's seas. Some skeletons may be found on Necrofex Colossus, but overall they are basically non-existent.