Kaita

Kaita the Bat Rider, is the true antagonist in the Disney Channel show Pair of Kings. He was the king of the Tarantuala people and the dark side of Kinkow. He spends most of the series in the form of a mummy, but is fully ressurected by the series finale.

Mortal Life
It is siad that a thouand years ago, he ruled the darkside of Kinkow, and wished to destroy the light side. It's implied he  had great power in his mortal life, because he was known to ride a demonic bat as means of transportation. He was eventually killed by one of the kings, and eventually mummified.

Mummy and Ressurection
In an undead state, he killed Brady, Boomer, and Boz's parents, but he never tried to put his plan into action until the series began. When Brady and Boomer first arrive in Kinkow, the Tarantula people first attempted to find the Bat Medalion to ressurect him.

In the series finale, after Brady leaves and his long lost brother Boz returns, Kaita is fully ressurected. The first thing he does is kill all the Tarantuala people, and ressurect them as the undead to attack the people of Kinkow. He first meets Boomer and Boz, and fights them after revealing he killed their parents. He uses his demonic bat to fight them and was seemingly killed when it falls into the ocean. He is shown to have survived and fights the brothers face to face. He begins to gain the upper hand, when all the tribes of Kinkow band togehter and use their tribe gems to blast him into Mount Spew, Kinkow's volcano, killing him and restoring the light side of Kinkow.

Triva

 * He is protrayed by Damion Poitier, who played Thanos in The Avengers.
 * He is the only villain on the series to have actually succeded in killing a king.