They can be anything or anyone ( and so can HE, apparently ) so one way or the other, lets see some changeling spies for this challenge!
30 minutes to draw, 15 to submit. have fun!
Artists:
https://derpibooru.org/profiles/DanielTepesKraus
https://www.deviantart.com/crystalchan2d
https://www.deviantart.com/recluseproductions
https://www.deviantart.com/butts-mcpoop