Thread:Undoniel/@comment-5270921-20131213185514/@comment-3406131-20131223160433

Waiting for the author's response, here Stuart Vandal's one.

"He hasn't retroactively become a mutant. He hasn't become one post-AvX either. Real world, someone probably goofed and thought he was a mutant. In-story "no prize" explanation, Scarlet Witch's spell worked on him because she thought he was a mutant - her subconscious picked who did and didn't get teleported."

Relevant if the Scarlet Witch knows at least a little Puck, which isn't impossible. I post it in waiting for the confirmation/infirmation/third way answer.