Chameleking is a Terrible-Monster that appeared in the TV series Ultraman Ace. He appeared in episode 2. It was created by Yapool from combining the eggs of two different species: an ancient chameleon and a space pterosaur.

Chameleking was the next Terrible-Monster to appear on Earth following the defeat of Verokron, as a giant egg in a construction site,planted there by Yapool. A man examined the egg, only for it to suck him into it and burrow underground before TAC could investigate. Later, their radar picked up a UFO, which was Chameleking's egg which has grown in size and was somehow capable of flight. Although shots were fired, the egg was unharmed. Later that night, the egg destroyed a jumbo jet, alerting TAC. TAC deployed to find a way to stop it but their attacks did nothing to defeat it. The egg landed on top of a skyscraper and Hokuto kept firing on it but he stopped due to the possibility of the surrounding people being harmed. Meanwhile, Yapool decided to summon a second egg as the other somehow attracted it.