This supervillain was once Mr. Incredible's "number 1 fan". In an attempt to earn his hero's respect, Buddy Pine tried to aid him in fighting crime as "Incredi-Boy", with gadgets he had invented in his spare time.
Syndrome has no superhuman powers, but he is incredibly intelligent, making him a super in his own right. He has invented numerous weapons, and high-tech vehicles that utilize such principles as robotics, anti-gravity, and zero-point energy, which he sold to black market buyers to make himself rich.
Source: Wikipedia, "Syndrome (The Incredibles)", available under the CC-BY-SA License.