Cyborg Rats
The Cyborg Rats are the X-Terminator's combat minions, appearing in the episode "I'm Bored" of Hamster & Gretel, alongside their master. The X-Terminator has a whole army of these robotic rodents, which he unleashes on any live rodent in order to destroy them.
The Cyborg Rats are the same rats that the X-Terminator has caught in his sophisticated rat trap, before he got merged with said rat trap thanks to a merging machine by his lab partner. The rats he caught had also been merged with the rat trap in the same accident, though the X-Terminator would not elaborate, claiming it's a "story for another time".