Droidekas, also known as Destroyer Droids, were a type of droid used by Confederacy of Independent Systems during the Clone Wars.
Droidekas were dangerous and deadly, designed to exterminate their adversaries with extreme prejudice. They could transform their shape by curling into a ball and moving across a surface, or stand on three legs and utilize a shield generator while firing at a target.
During the Clone Wars, these types of Droids were deadly killers and a formidable foe. Most of them were wiped out when Emperor Palpatine executed Order 66, but some of them along with General Kalani went to the planet of Agamar.