Equestria Daily: Trade Yah – The Story Behind The Wheel Chair Pony, or Stellar Eclipse
This article by EQD sheds a little more light on Stellar Eclipse, including the fact he was added into the show as part of the Make-A-Wish foundation. This gives me even more credence (including a request from the VA/his family to not release too much information so he won’t be bombarded by bronies) to why you should not be making pornographic images of this character. If he doesn’t want to be contacted by bronies, I really, highly, supremely doubt he wants you guys to be making adult content with his original character.