"Now was that civilized? No clearly not, fun but in no sense civilized!" - The Brain Gremlin
The Brain Gremlin is the main antagonist of Gremlins 2: the New Batch. At first he was just an average Gremlin until he drank a Brain formula made by Doctor Catheter in the Splice O' Life lab which transformed him into a smart and educated Gremlin, where it would go on to become leader of the Gremlin horde.
Later on he and the other gremlins begin to sing 'New York, New York' but Billy decides to put an end to this madness before the gremlins manage to get outside the Clamp Center. He later dies along with the rest of the other gremlins when the Lightning Gremlin electrocutes them.