General Mono

General Mono is the true tertiary antagonist of ''TMNT. ''Mono was part of Yaotl's Brotherhood until he and Yalta's other three siblings were encased in stone. Three millennia later, he was revived by Yaotl.

Early life
Mono was the third most trusted of Yaotl's siblings and the five of them became Aztec tyrants.

Encased In Stone
During a battle, the Stars of Kicaan aligned and encased Mono to stone for three millennia.

Trivia

 * He was unvoiced