The Ace-6 droid brain, produced by Cybot Galactica, was a droid brain used by the Imperial Remnant and the reborn Palpatine in the Droid TIE Fighter. Although more advanced than the droid brains used by the Confederacy of Independent Systems during the Clone Wars, they were no match for living pilots. The production of the TIE/D was halted due to the Remnant concluding that droids lacked the quick thinking and wit of living beings.