Aegislash is the only Pokemon that actually moves and changes form. The other Pokemon that you mentioned all use the same animation, a black fuzzy image covering them and disappearing(sorry I couldn't find a picture).This is most likely because these Pokemon change shape, while Aegislash's form doesn't change, just its stance.
Here is a video showcasing a Zoroark, if you want to see the form changing animation. Skip to 5:09 to see the animation.
Hope I helped!