IG-666, known heavily as Scratch although unrelated to Clawcious R. Scratch, was an IG-series assassin droid built by Eggman Robotnik and manufactured by Holowan Laboratories. One of the most famed IG droids behind IG-88A, Scratch was known for killing many criminals for bounties, and often sided with Boba Fett when he collected bounties for Hutt crime lord Jabba Desilijic Tiure. In addition to his superior weapon skill, he was one of the few droids that could actively and precisely use a lightsaber, of which Scratch owned a Sith lightsaber with a red synth crystal.