Gizoids (ギゾイド Gizoido?) are a group in the Sonic the Hedgehog series. It is a mass-produced line of combat androids created 4,000 years ago by the Nocturnus Clan as advanced infantry in their wars of conquest. Following the Argus Event however, the entire Gizoid line was trapped within the Twilight Cage along with the Nocturnus Clan, excluding a single specimen, Emerl. Nearly 4,000 years later, Emerl was found by chance by Professor Gerald Robotnik, and was given the title "Gizoid" due to being the only known Gizoid model on the planet.