Superman Robot
In the Gold and Silver Age of comic books, Superman was really, really smart. He was so smart that he built robot duplicates of himself that had his super-powers. Superman would have them patrol for crime, perform hazardous tasks, and help convince Lois that Superman really isn't Clark Kent at least twice a week.
In modern times, Superman isn't smart enough to create robots by himself anymore. But Superman robots still pop up, like in this Justice League of America story, which inspired this particular custom.