You're only supposed to make unban topics for yourself. So if this is your brother and not your alt, he needs to make the unban topic. By the way, I have never heard of anyone getting banned for too many Diamonds in inventory. If it says banned for xray when he tries to join then it means that the plugin banned him. If it happened this map, it is a perma ban. What is the message when he joins the server? If banned by admin, give more information on when he got banned. sowwie, just trying to help :S