I have 2 coc accounts on one gamecenter and I don't know how to make the second one that I made the main one

So my brother made his coc first then I made mine on the same gamecenter so I'm wondering how to put my coc on a different device because it when ever I go to link a device it says to login to the gamecenter attached to my village but that is the gamecenter I was signed into when i made my coc. So how do I put link my iPod to my new phone?