What is this "ghost player"?

I named him that because he has no official name and no face, name or message whatsoever.Anyways on the PSS I came across a weird player face sprite. It was male haveing no face but eyes, hat, sunglasses and a black shirt. He had over 90,000 likes and birthdays. He had no history of any kind of battles and trades outside of the gts. (That I could find.) Obvious hacker, but what did he use to so badly destroy he’s character?

He was playing Pokemon x or y as it asked me to play by kalos rules when I challenged him.

Pleaselog inorregisterto add a comment.

Sometimes users like that pop up. It’s unexplained, but I’m guessing it’s a glitch in GTS. I’ve seen it before. Sorry for the wishy-washy answer, but I don’t really think there is much of an explanation.

Edit: since I wasn’t clear enough I guess and I took a little time to think back into retrospect:

I meant encountering them like that on the PSS. I’m guessing hacking or cartridge reading failure like smiley said in comments. Another guess is PSS server internally glitched because of the load.

(Edit2: Edited out ORAS trainer idea, didn’t see was Kalos)