Marvel Family Supporting Cast
| Alter Ego: | |
| Height: | 5' 5" |
| Weight: | 130 lb. |
| Hair: | Black |
| Eyes: | Blue |
| Base of Operations: | Fawcett City |
| Notable Powers: | Boy Genius and Inventor |
First Appearance:
Captain Marvel Adventures #133
(Jun 1952)
Captain Marvel and a New Home for Billy
Last Cataloged Appearance:
Shazam! #26
(Dec 1976)
The Case of the Kidnapped Congress