If you have a Shiny Xerneas and you want me to clone it. No I can't do that, it's not allowed by forum rules. There is a section somewhere where you can ask people who are authorized to clone for you.
This is not because I can't clone but it's for your own safety in case people are scamming ;)
No, I mean, if you just want to clone it, I can give you mine for you to clone right now (another shop did that yesterday). But if you don't want to clone, I can still get one for you using my other game copies. It's up to you :)