Apparently it's more of a thing than I thought. I started looking up some information that Alpha had gotten for us. In 1993 was the Green Ranger, which everyone knew about. Then Rita Repulsa and Lord Zedd tried to create their own evil team of Rangers a couple of times. The Turbo Rangers before TJ and everybody had to deal with the Shadow Rangers, copies made from their powers. There were clones and brainwashed Rangers, and one time when Astronema used Ashley's morpher, which I'll have to ask them to tell the story of. But the Psycho Rangers were the first major threat of that kind.