ChalkZone was originally part of Oh Yeah! Cartoons before becoming its own show. One of these shorts shown on Oh Yeah! Cartoons did not make it to the final show. It was named "Chalk Dad". The complete storyboards for the episode have surfaced (https://www.scribd.com/doc/54234544/Chalk-Dad), but not the final product itself. It would of aired sometime in 1999.
"Bluedramon" of the ChalkZone forums says she has it on tape, but it's at her parents' house, provided her parents didn't throw the tape away to make room for storage.