Objective: Terminate Tommy Dawkins.
~ X-9000
The X-9000 killer cyborg, that's who.
~ X-9000

X-9000 is a seemingly handsome killer cyborg from the future modeled after Merton J. Dingle, and the eponymous main antagonist of the episode "Mertonator" of "Big Wolf on Campus".

He was portrayed by Danny Smith who plays Merton Dingle throughout the series and was best known for have written, produced, and sang the show's theme song. During the show, the character Merton tries writing a song, and actually writes the show's theme (albeit with one or two words changed).