Double Trouble Skrawl has devised yet another plan to take over ChalkZone. This time he has teamed up with the evil futuristic robot, Craniac4. Their plan: design a robot that will pretend to be Rudy, enter the Magic Chalk Mine and destroy it, leaving Rudy chalkless. They just need to find a suitable robot. Meanwhile, Rudy and Penny have also teamed up to design a robot that will win the coveted National Young Robot Developers (NYRD) award. But they're having trouble agreeing on the design. Penny wants a practical robot, Rudy wants a martial arts fighting machine. Unable to agree, they erase it from their chalk board. Unfortunately, Skrawl and Craniac4 see the Rudy-and-Penny-designed robot and realize it's perfect for their plans. They collect the robot, disguise it as Rudy and send him off for the Chalk Mine with the intent to deystroy it. While the Robot Rudy heads toward the mine, Skrawl occupies Rudy's time with threats to the zoners. The threats are designed to use up both time an