Brat-A-Rat

Brat-A-Rat is the secondary antagonist of the animated series "Filmation's Ghostbusters". It's in many ways Prime Evil's right hand ghost. He resided at Hauntquarters with Prime Evil, often resting on his shoulder like a pet parrot. Many times he rounded up the ghosts for Prime Evil. He was also known for being the one to discipline a ghost that fails to fulfill Prime Evil's orders. Brat-A-Rat was in the vault when Prime Evil got trapped in there. While not much is known on his history, it appears that he isn't the only creature of his species, as in an episode he meets a female creature very similar to him, named Bratarina, of whom he falls in love.

Appearance
Seems to be a ugly rat like alien, in keeping with the sci-fi aesthetic that seems to be a common theme amoungst Prime Evil's henchmen. Steam will occasionally shoot out the tubes on his back.

Personality
Brat-A-Rat was known for tattling, and giving ideas which Prime Evil then took credit for. Most of the time he was seen at Hauntquarters or at his own place just outside of it. He is also rather sadistic, as he has pleasure in inflicting punishments on Prime Evil's subordinates on his orders.