a childlike mystery solved.

From IMDB, which I guess has had this info up there forever, but I never looked until this morning:

The Childlike Empress: Bastian? Why don't you do what you dream Bastian?
Bastian: But I can't, I have to keep my feet on the ground.
The Childlike Empress: Call my name... please... save us!
Bastian: All right! I'll save you! I will do what I dream!
[crawls to the window and yells out into the night]
Bastian: MOONCHILD!

What kind of mom is named "moonchild" anyway.