Nerbs are creatures that appears in the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics. They are a race of subterranean Mobians, known for their nerdy appearance and behavior, as they are rude and snobbish to outsiders.
The Nerbs lived peacefully bellow the surface of Mobius for centuries, creating tunnels to live in and navigate. It was not until Dr. Robotnik began underground construction that the Nerbs came to the attention of the Mobians on the surface. With their air and water lines damaged, a Nerb scout went to the surface to investigate and ran into the Knothole Freedom Fighters. Needing to escape one of Robotnik's traps, they followed the Nerb to the city of Nerberhood to speak with the Nerb King, who blamed the group for his people's problems despite having no proof. Expelling them from the city, the Nerbs were then surprised when the Freedom Fighters not only saved several of their kind from Robotnik, but thwarted his digging efforts by flooding the Mobius Sewer System. The Nerbs promptly thanked the Freedom Fighters by making them honorary Nerbs, an honor that the Freedom Fighters did not enjoy much.
Latter on, Dr. Eggman took control of the Nerbs and created a Dark Legion to rule them, led by The Foreman. The Nerb Freedom Fighters, led by the Nerb King's daughter, seek to overthrow the legion and restore the kingdom.