The Extra Life is a character that appears in the Sonic the Comic series published by Fleetway Editions. It is an evil clone of Sonic the Hedgehog created by Dr. Ovi Kintobor before he became Dr. Robotnik.
The Extra Life looks closely identical to Sonic the Hedgehog in every aspect, only with pointier ears and sharper fur, eyes and fangs.
The Extra Life was created by Dr. Ovi Kintobor, before the accident that turned him into the ruthless Dr. Robotnik, to help his friend Sonic the Hedgehog - to be an 'extra life' for the blue hedgehog. However, the Extra Life turned out evil and was imprisoned in a monitor where it waited and plotted its revenge.
Years later, Tails discovered the Extra Life's monitor in the Emerald Hill Zone whilst playing soccer/football. Believing it to be Sonic, Tails released the Extra Life from the monitor. The duplicate quickly went on a rampage across the Emerald Hill Zone, destroying the village and starting a forest fire. The Extra Life went toe-to-toe with the real Sonic and nearly defeated him, until Tails re-imprisoned it in the monitor, which Sonic then kicked into space.