I'm convinced that there are a few things that are sending us to Hell in a Handbasket and Kewpie dolls are near the top of the list. I'm not sure where the term キュージョン (kyu-jon) comes from but it has something to do with these Hell-dolls.
There are several examples of where these Kewpies meld with other characters (eg. Devilman) but the worst has to be...
On the side of this box, you can acquire GeGeGe himself, Rat-baby, Cat-baby or BaBa-baby. All very creepy!
On the other side of the box, you will see Wall-baby, Old-man-baby or Flying Carpet-baby.
And then there is the mystery character which I was lucky enough to acquire: 目玉のおやじ or Medame-oyaji-baby which is a Kewpie doll with a freaking huge eyeball on its forehead! Awesomely horrible!
All that being said, if it were made available as a Halloween costume, I'd wear it in a minute!