Wikipedia
ChalkZone is an American animated television series created by Bill Burnett and Larry Huber for Nickelodeon. The series follows Rudy Tabootie, an elementary school student whose magic chalk allows him into the ChalkZone, an alternate dimension where everything drawn on a blackboard and erased becomes real. The show concentrates on the adventures of Rudy, his sidekick Snap, and classmate, Penny Sanchez, within the zone.
ChalkZone originally aired as part of Fred Seibert's Oh Yeah! Cartoons animated shorts showcase in 1998. The series ran on Nickelodeon from March 22, 2002 through August 23, 2008, with 40 episodes in total. It was produced by Frederator Studios and Nickelodeon Animation Studio.
A popular rumor about the show is that it was based on Simon in the Land of Chalk Drawings. In fact, Bill Burnett debunked this in a 2013 interview, revealing that he was not even aware of the series' existence until after ChalkZone entered production.