What kind of villains appeared in the wild wild west?

Quick Answer
The main antagonist in Wild Wild West is a mad scientist bent on revenge for the United States' loss in the Civil War.
Explanation
Wild Wild West is a 1999 steampunk Western comedy that follows government agents Jim West and Artemus Gordon as they protect President Ulysses S. Grant from the schemes of a single, formidable villain. The film places this villain in the archetypal role of a mad scientist, whose inventions and plots are driven by a personal vendetta for the nation's defeat in the Civil War. This character’s motives are rooted in revenge, making him a classic example of a villain who uses science and ingenuity to pursue a personal agenda against the state. The mad scientist’s presence shapes the film’s blend of comedy, action, and steampunk aesthetics, providing a clear, singular threat that the protagonists must overcome.