Yuki is a unique Uxie. It's not because he is a shiny Uxie, but because his mindset is linked to somewhere else. He is an inventor, not a scholar, for that he will be able to tell you what technology was made when. Unlike most Uxie, who are only interested on what's going on with the left side of the brain, as to which they give logic and meaning to those around them, Yuki enjoys going for the right by being creative with his work.
You will find this image on my askuxie blog.