In Pixar's Cars 2, which character is the main villainous scientist behind the spy plot?

Professor Zündapp is the villainous scientist behind the spy plot in Pixar's Cars 2.

Zündapp is an inventor and ally of the film's criminal conspiracy. He helps develop a device that causes cars using Allinol to malfunction when exposed to electromagnetic pulses. The scheme is intended to make alternative fuel appear dangerous and to benefit another energy source.

The character works with a group of modified lemons, including several internationally notorious cars. His name and appearance evoke stereotypical spy-film scientists, while the story deliberately uses automotive versions of espionage conventions.

Zündapp is opposed by British agent Finn McMissile and rookie field agent Holley Shiftwell. The conspiracy also involves World Grand Prix promoter Miles Axlerod, whose public role and hidden motives become central to the film's climax.