This was drawn for Grimm’s Horror Picture contest (http://www.furaffinity.net/journal/7801940/). After hearing it’s announcement, this instantly came to my mind. It was originally called “Pelenka-geist”, but I feel that would lead to an exorcism styled movie, and I find those boring, so I changed it to Pelena, the Albanian word for diaper.
If this were an actual movie, I’d make it a twisted version of Little Nemo in Slumberland. Featuring nightmarish landscapes with symbolism for the character’s fear, and Monsters that you can never clearly see, so your imagination does the work of identifying them. And of course, a Demonic diaper.