Source: Superman's Pal, Jimmy Olsen #90 (1966)
Type: Experimental android chameleon (it's a whole type!)
It's all taken out of his hands when the aliens return to Earth to get their creation back. They never figured anyone could use and abuse it this way - these are not the smartest of aliens - so they'll take it home with them, and in my version at least, dissect him to see what went wrong. Sorry Jimmy-Friend!