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XANA created several robots in the episode The Robots. At the beginning of the episode, XANA built a prototype and tested it at the end of the Annual Robot Competition. This robot had no extra weapons, was still quite dangerous. It was shut down by Herb's Hummingbird Robot. After Ulrich goes to the Factory with Yumi to assist Odd in getting Aelita to the activated Tower, it is discovered there is a whole army of robots. These robots each had a new weapon; large guns that shot metal nuts, clearly an idea XANA picked up from Herb's robot, the Iron Sissi. One of these robots almost killed Ulrich, but Jeremie activated a Time Reversion just at the right moment to save his, and many others', lives.