The Nightmare Men are villains that appeared in Wikizilla: Rulers of Wiki. They lived in the Under World and created the trials used when people try to leave the Under World.
Wikizilla: Rulers of Wiki Edit
Though they never made an appearance in their true form, the Nightmare Men appeared in the Under World using the forms of a Math Teacher, the Terms and Conditions and a Virtual Boy. They created three incredibly difficult trials that Deathrock9 was put through when he and Slimer traveled to the Under World to save Zippy.