Sonic the Werehog

Sonic the Werehog, also known as simply the Werehog (ウェアホッグ Weahoggu?) for short, is a transformation that appears in the Sonic the Hedgehog series. A bestial and werewolf-like form of Sonic the Hedgehog, this extreme physical transformation was created when Sonic forcibly absorbed the negative energy of the Chaos Emeralds, though the transformation itself only activated at night and remained active until sunrise. Sonic lost this form permanently when Dark Gaia absorbed the energy that caused the transformation in order to accelerate his maturation, curing Sonic of the Werehog condition.