|This character exists primarily or exclusively within the Sonic X continuity.|
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
Bat Brains are robots based off of bats. Their upper body is blue with their lower body being grey. The posses bat wings as well as a rocket for a tail that allow them to fly.
After Sonic the Hedgehog arrived in the Marble Zone, he decided to take shelter in a nearby ruin. Within this ruin, he encounter several Bat Brains that attempted to attack him, but they were swiftly taken care off and had their Rockies released.