Katchu Picchu

Assumed former ruler of the ancient Megakat realm, Katchu Picchu became nothing more than a mindless undead multi-story creature under the control of the Pastmaster. After the Jeweled Headdress was destroyed, Katchu Picchu dissolved into a steaming pile of flesh, and his pyramid was literally eaten up by the ground on which it stood.

Trivia
His name is an obvious reference to the Ancient Incan city of Macchu Picchu, in Peru. Also, his visual design great resembles a typical mummified corpse from Incan culture.