I have been looking for the book containing these ref sheets for most of X&Y's human cast to no avail. I don't even know what it's called, is it the official japanese guidebook?
I also have been trying to find the origin of that AZ concept art where he looks like a massibe hobo (more than usual) that has a completely different artstyle than the series' usual.
Can anyone help me? No major fansite seems to have info on this except hosting the original, ancient scans from the X&Y days (which were probably originally posted on some tumblr back then).

And no, it's not the X&Y (Kalos?) World Art Book.