Sonic the Werehog (ソニック・ザ・ウェアホッグ Sonikku za Weahoggu), or just the Werehog (ウェアホッグ Weahoggu) for short, is a transformation that appears in the Sonic the Hedgehog series. A bestial, werewolf-like form of Sonic the Hedgehog, this extreme physical transformation was created when Sonic accidentally absorbed a dose of Dark Gaia's energy onboard the Chaos Energy Cannon, although the transformation itself would only be triggered by nighttime and remain active until daytime. After using it on a number of occasions, Sonic lost this form permanently when Dark Gaia reclaimed the energy that caused the transformation. In this form, Sonic loses his speed in exchange for incredible strength and stretchable arms. He also gains a bit more feral and bestial behavior as a Werehog, including a deeper and more growling voice, a tendency to roar and howl, occasional quadrupedal movement patterns, and a shorter temper. Even when Sonic turns into this form though, his heart is (almost) no different from the usual Sonic.