Can you make Detective Conan/Case Closed Skin?

Both! Hmm, well, you can make a victorian/steampunk series, or maybe a casual skin series. :D

Sounds like a good idea. For the theme, something alot of people are familiar with like a well known game (other than minecraft) like my Team Fortress 2 Skins. I would leave the shading to the people who use them as there are many different ways or "types" of shading and shading for people would encourage cheap skinners with low ability to take these and use a transparent colour to colour them. The Boy/Girl thing really depends on the theme of things, really start, like I said with the more well known characters. I think this would turn out into a really good skin series and I'll subscribe so that i'll be ready when they are relleaced.
Give a holler if you have any questions - Average Shopkeeper, Skyrim