Star Wars: Enemy of the Republic - Dark Side
Mysterious Creatures from Another Dimension
These strange creatures almost resemble droids, but are actually much smaller beings encased in an armored and heavily armed mobile shell. They were encountered in a remote refueling station on the Outer Rim whose residents and employees had apparently all been wiped out by the Daleks.
The Daleks seem to suffer from a powerful xenophobia, and were bent on the subjugation and destruction of all other races. Fortunately, they were all destroyed before their plot could reach fruition.