The Killer Robots are JP Goppernopper's robot servants. They only appear in The Adventures of Ook and Gluk: Kung-Fu Cavemen From the Future.
When the killer robots capture Ook and Gluk. Lily vomits on the floor, causing the robots to slip. The robots are destroyed on impact and the boys are freed. After the Goppernopper bloodline was killed off, JP's robots might also have ceased to exist.