The Ultimate Proto-Bot 10000 (aka UP10K or Protobot for short) is a gigantic robot, and a major antagonist in Club Penguin. It was originally created by the Test Bots using drawings from Gary's notebook of blueprints and items around the Island such as the Stage's Ticket Booth, the inner tubes from the Dock and Ski Village, the Aqua Grabber 3000 cockpit bubble and red tubes, a mine cart, the Boiler Room boiler, and two Night Club speakers. Later, he became made out of more advanced parts from elsewhere.