And some of my headcanons are that Evil Morty its a control obsessed freak and is a bit manipulative, likes to see the pathetic side of Prime and is afraid of one day being like Rick, he is a bit traumatized but is very self aware of that.
Evil morty was more hard to redesign since he doesn't have an adult Canon but based on the way he dress I tried some suits or something more futuristic...(here some outfit ideas)