Which villain uses the name Professor Z in Pixar's Cars 2?

The villain who uses the name Professor Z in Pixar's Cars 2 is Professor Zundapp.

Professor Zundapp is a small German car and an international criminal scientist working with Sir Miles Axlerod. He helps develop the plot involving the World Grand Prix, the alternative fuel Allinol, and an electromagnetic weapon.

His nickname, Professor Z, is derived from the first letter of Zundapp. The name also references Zündapp, a German motorcycle and vehicle manufacturer founded in 1917, although the film’s character is a fictional spy-movie-style antagonist.

Cars 2 changes the franchise’s focus from local racing and community life to international espionage. Mater becomes unexpectedly important because his apparent mistakes help expose the conspiracy.