|Residence||Billy's house and the Space Fortress of Doom in the Black Nebila in Outer Space.|
|Real world information|
|Appears in||Billy and Mandy Moon the Moon|
Dr. Brainiac is one of Billy's toys. However he was brought to life by aliens that live on the moon, ever since then he wants to take over the world. He works with an alien bug named Stinky, they met when Billy put Dr. Brainiac on Stinky to save him from the moon aliens.
- He slightly resembles Dr. Animo from Ben 10 (before Alien force)