Once a general in Shinnok's armies, Reiko lead the forces of darkness into the battle against the Elder Gods. Once thought killed during that onslaught, he resurfaces and joins the battle against Earth's forces.
Weapon   : Spiked Club
Ready Weapon  : D, F, HP
Windmill kick  : D, F, HK
Teleport   : D, U
Super Throw   : D, B, LP
Stars    : D, F, LP
Fatality #1   : F, D, F, LP+BL+HK+LK (Close)
(He just rears back and kicks your upper torso off backwards)
Fatality #2   :  B, B, D, D, HK (Just past sweep)
(Reiko showers his opponent with shurikens.  He then holds the last one to his eye for aim and throws it right between the victim's eyes)
Prison Stage Fatality   : D, D, B, LP (Close)
Goro's Lair Fatality   : F, F, D, LK (Close)
Kombo #1-- Jump in deep, tap HK, D, U, BL --15% damage
Kombo #2-- Jump in deep, tap HK, B, D, F+HK, LP --24% damage
(Note: Your weapon must be drawn to start this combo.)
Reiko's ending is very korny. All Reiko does is just walk through a portal. That's about it.
In the home versions he goes through the portal.  He sits in Shao Kahn's throne and Shao Kahn's mask floats down onto his face.  This means...Reiko is Shao Kahn!