Official EW Unit Guide

Undead Tribe: Hailing from the swamps of the dark forest surrounding Hollow Shades, the Undead Tribe are a varied assortment of powerful creatures with many abilities. They are strange and incredibly dangerous at times, but lack in organization and have no defined leadership. They are incredibly aggressive, and will not hesitate to attack anything that moves. However, their intelligence is usually unreliable, as is their ability to maintain a clear head in combat.

Zombie Ponies - The undead. They rise from the graves at dusk, but will often shamble around randomly. They have occasionally wandered into neighboring towns and have been mistaken for drunks.

Units:

Walkers: Undead warriors. Their bite is incredibly painful, mostly due to the infection they carry. One bite can make the most brutal of Orcs fall to the ground, screaming in agony. That goes without mentioning the side effects, which include death and resuscitation as an undead beast. Indeed, Walkers would infest the world entirely, if it weren't because of their dim brains and the ease with which they tend to kill themselves. Walkers have no sense of direction, and generally rush into things and fall into holes, effectively killing themselves. The best way to utilize Walkers in combat is to attack a large number of enemies who are standing in flat, or unblocked terrain, as even the most basic of defenses will prove too much for a Walker.

Mana Remnants - When ponies die a quick, violent death (Usually by explosions.) their magic is concentrated enough that a pony-shaped cloud of pure energy remains. This "Energy Cloud" is still occupied by their soul, allowing them to be controlled like their biological body.

Units:

Scorchers: Missile troops specializing in firing bolts of electricity at their enemies. Scorchers cannot harm others with physical attacks, and in a similar manner they cannot be harmed with physical attacks, but the amount of shots they carry is limited to no more than a dozen discharges per day. However, it should not be taken lightly when a Scorcher enters the fray. As they are made of pure energy, they cannot be stopped with brute force, and the only ones capable of doing them harm are magical troops. This makes humans and unicorns their most lethal enemies, but leaves Orcs and other non-magical creatures entirely defenseless against them. When a Scorcher utilizes all their shots, they become practically useless.

Ghoul Pony - A ghoul pony is, essentially, an undead pony spirit without a body, that manifests near a cemetery where zombies have risen. They retain their intelligence and soul after death, which makes them fairly sociable. Ghoul ponies eat dead plants and tree bark. They also enjoy munching on living plants and fruits, vegetables, as well as other organisms, but they can't digest them.

Armor Pony - A pony's spirit that becomes bound to an object. An armor pony can come in any shape or form, from armor to weapons, and as far as simple jewelry or utensils. Armor ponies are known as such because of the great heroes of old, whom are said to have wielded armors that granted them an undead spirit for guidance and companionship. Armor ponies can only be destroyed if the object to which they are bound is obliterated. They can actively participate in combat despite their spiritual form, but only magical attacks can harm them. Armor ponies can be rebound to a distinct object via a ritual.

Skeleton Pony - Similar to armor ponies. A skeleton pony's spirit is bound to his own bones. Skeleton ponies cannot leave their bound object. Physical attacks can harm them, but they are harder to destroy, as their spirit is bound to each and every single bone they own. Skeleton pony bodies can be repaired if some of their bones are destroyed. All that is needed is a replacement of the original bone and a ritual to perform the binding.

Wight - A wight is basically a zombie who's soul (or at least part of it) remains attached to the body, meaning they retain a good portion of their personality. The bond between their body and soul is kept together through harvesting other souls either entirely or partially depending on quite a few different variables.

(Thanks to ISKV for a lot of these awesome ponies!)