On one of Emperor Zurg's deals, he asked the Friends to tell him how to create a robotic agent to serve as his residential energy feeder. As a result, the robotic vampire, Nos-4-A2, was born. It quickly proved to be a deadly enemy of Buzz Lightyear, with his enery draining skills to boot. Eventually, Nos-4-A2 decided to create his own evil agent, and made the Wirewolf, a robotic werewolf, from the soul of Ty Parsec. In the end, though, Nos was destroyed by Buzz Lightyear and Parsec was freed of the Wirewolf curse.