Board Thread:Off Topic/@comment-28716546-20160825172539/@comment-24922135-20160825194804

Viktor was shown to be able to turn from a human disguise into his Transylians form (albeit never back into human), tho my head canon is that he had some kind of disguise mask on like the UAF ones. Also BTP lists Pyronites as having human forms, despite Alan being the only one to show that power. (His name WAS Alan, right?).

Celestialsapiens also inherently possess shapeshifting powers. Swarms of 'the hive' like Elena Valadius could turn into a more human form/disguise. Oh and we can't forget the Slitheen. Kevin 11 showed some capacity to shapeshift between species in OS. I can't think of many more off the top of my head.