Night Master

Night Master  billed as a "Dark Overlord in an Evil Class All By Himself", is a very powerful and dangerous foe, who is the main villain in Jetix cartoon show Yin, Yang, Yo¡. Appears to be a demonic sorcerer bat (as such, he hates light) of some description and has a liking for "gothically" ostentatious outfits.

The Night Master communicates frequently with his servants using a hologram. Is very intelligent, though his plans typically fail because of the stupidity of his minions.

He is voiced by David Hemblen.

Description
It is a cross between a Leaf Nosed Bat and a Chinese dragon and is very vulnerable to any kind of light; surely it is the most powerful of the enemies of Yin and Yang and also the most astute and subtle. Defeated in the past by Yo, with a spell convinced the whole world that Woo-Foo was a totally useless martial art; at the end of the first series he is apparently defeated. In fact, in an episode, it turns out that he became a seller of evil weapons, in fact he sells an army of trolls to Eradicus. In the same episode, in the end, Eradicus complains to the Nightmaster's Army, who was defeated by Yin, Yang and Coop, asking to be reimbursed.

Past
His real name is unknown, because Nightmaster is just the title he takes on a being after becoming a dark gentleman.

In the past is responsible for the extinction of Woo Foo and most of the knights Woo Foo (with the exception of Master Yo). He has erased the memory of everyone in the city where Yin and Yang live, so everyone finds Woo-Foo to be idiots, but Master Yo has turned his powerful army into stone, and the only thing that can make the army come back is Power Woo-Foo.

Trivia

 * Ever since his defeat, the other villains have been developing their evil in an attempt to become the new Night Master. Night Master's appearance is similar to Aku of Samurai Jack fame and Hades from Hercules.
 * When Eradicus asks him if they have already seen somewhere, Nightmaster replies: "Let's say I work in the field of Evil!" making it clearly presuppose his return as the main antagonist.