Doraemon "Adventures in Candy Land" (non-existent unaired English dub of anime episode; 2015)
"The Mystery of Goodie Land" is an episode of the 2005 Doraemon anime series. The plot of the episode involved Nobita, Doraemon, Shizuka, Gian, and Suneo being transported to a second world while trying to catch a floating cake. They learn that the world around them is made entirely out of candy, and is supposed to be a candy-based theme park, which had mysteriously disappeared right before it was supposed to open. After voyaging toward a control tower, the gang discovers that the park was stolen, along with all the sweets in the world, by a jealous child who couldn't eat any of it due to his cavities.
For the series' US adaptation, Doraemon: Gadget Cat from the Future, the episode was apparently going to be dubbed into English under the name of, "Adventures in Candy Land". It is a special 30-minute episode (most US airings comprised of two 15-minute segments) and was supposedly set to air on August 28, 2015. However, despite supposedly appearing in early TV guides, the episode did not air, possibly due to concerns from Disney-ABC Television Group about it encouraging children to overindulge in sweets. However, this is just a rumor. It was replaced with another episode ("Noby! Noby! He's Our Man / Gone with the Sneeze"), and the dubbed version of "Adventures in Candy Land" has currently not been released in any form. 
In a livestream on September 25, 2017 by YouTube channel CLW Entertainment, Kaiji Tang, the US voice of Gian, guest-starred, and when asked about this episode, stated that nobody had recorded for the episode and that Disney likely pulled it before dubbing started (episodes may have needed their approval). It is also possible that TV Asahi or Fujiko Pro wanted to dub it, but plans changed.