Uncle Cliff (seen in Remooned) is Ignignokt's mentally handicapped uncle who hasn't been "alright" since the Lunar War. There is not too much to say about Cliff besides the fact that he lives on the Moon, shoveling moon rocks and is terrorized by Ignignokt and Err every once in a while as well as being incredibly easy to scare. He only has one leg, possibly having lost the other one in the Lunar War. Most importantly, Cliff is a roofer.
He is voiced by Vishal Roney.