Villians: Future Shego, Future Drakken, Robo-Duff, Monkey Fist. Bonnie might be included because shes educating people to be evil.
If Shego didn't listen to Drakken, then maybe she would still be the ruler that she was in the future. But I guess we know that Drakken usually doesn't win due to his over-gloating and over-confidence.
Its not unusual but Ron saved the day yet again with his rebelling attitude and by breaking the Tempus Simia idol to return everything back to normal.