shadow the hedgehog
shadow the hedgehog Shadow the Hedgehog (シ ャ ド ウ ・ ・ グ グ グ グ ō ō ō ō Shadグ za Hejjihoggu?) Is a fictional character from the Sonic the Hedgehog series. He is an anthropomorphic hedgehog / black arm hybrid and the arch-rival of Sonic the Hedgehog. Shadow was created as “Ultimate Life Form” (1949 Kyūkyoku Seimeitai?) By Gerald Robotnik, using the DNA of the Black Doom, and the end result of Project Shadow. His purpose was to provide ways to develop a cure for incurable deadly illness, more frequently for Gerald’s granddaughter Maria Robotnik, but he was captured and put into stasis by the military when he was deemed as a threat to humanity.Fifty years later, Shadow was released by Dr. Eggman in order to enlist him in his plan to conquer the world. Initially, Shadow worked with him but secretly sought to destroy the planet in order to avenge Maria, who was killed by the military, but was persuaded to save it from Gerald’s doomsday plans. In the process, Shadow lost his words and as such, sought to uncover the truth of his past, during which he met the Black Doom and the Black Arms; In the end, Shadow regained his words, uncovered the truth, and thwarted Black Doom’s agenda and saved the world. From there, he continued his mission to protect humanity by becoming a special agent of GUN.
Shadow is sharp-witted, always on edge, and has a strong sense of purpose, willing to accomplish any of his goals.  Essentially a dark version of Sonic, Shadow can match him in both speed and skill, and use Chaos Control with a Chaos Emerald. While preferring to work alone, he has helped Sonic and his allies when needed.
Concept and creation
Shadow and Sonic in Sonic Adventure 2, along with a Hero Chao, a Dark Chao and a Neutral Chao.
After the success of Sonic Adventure, it was only natural to assume that a sequel would have been produced. Hoping that the game would be for the Dreamcast what Sonic the Hedgehog 2 was for the Mega Drive, part of the team responsible for the first adventure title was sent to work at Sega of America. It was led by director Takashi Iizuka, while Yuji Naka remained back in Japan to work on other properties, including Phantasy Star Online. With the team in place, brainstorming soon began on what form Sonic Adventure 2 would take.
Early on, it was decided that one of the main themes of the game would be the dichotomy between good and evil. To help explore, the creators came up with new characters that would both assist Dr. Eggman and challenge the established cast of heroes. Although Yuji Uekawa was tasked with drawing the final design of the character, it was Takashi Iizuka who conceived the idea of Shadow,  coming up with the idea to use a dark, anti-hero figure who was similar to Sonic in shape, but not in personality. Shiro Maekawa was the one who came up with Shadow’s final design. 
When being designed, the character’s original name was “Terios,” which translates to “reflection of,” more than likely to play off of the hero / villain dynamic within the game.
Once Sonic Adventure 2 was announced, the identity and nature of Shadow was a heavily guarded secret. The character was the first to appear in the public game trailer for Sonic Adventure 2; However, his name was not revealed. GameStop described what little was shown as anti-sonic – similar in appearance, but with darker skin, more angled eyes, and a fearsome scowl instead of grinding Sonic’s trademark. “
When Shadow sawmingly died in Sonic Adventure 2, there rose a huge fanbase for Shadow to appear in more games, after being disappointed by his “death”. This let Takashi Iizuka input Shadow as a playable character in Sonic Heroes and even star in his own game, Shadow the Hedgehog.  In fact, Takashi Iizuka said that he kept the mystery around the character of Shadow the Hedgehog and wanted to feature him in his own game since he was introduced.  For the Shadow the Hedgehog game, after feeling that it would be inappropriate to give Sonic’s character a gun as fans had requested in the mailings,  Yuji Naka believed that by focusing on Shadow for his own game, they could use his different identity. Sonic to build upon the Sonic brand. 
Shadow is a black hedgehog with red stripes on his quills, around the edges of his eyes, and on his arms and legs. He has red eyes, a patch of white fur on his chest, and his muzzle is tan. He has six quills on his head, four of which curve upwards and two that curve downwards, two spines on his back, and a small tail. For attire, Shadow wears white gloves with black cuffs and red tongues, and Air Shoes which, like his gloves, have black cuffs and red tongues. On each of his wrists and ankles, he wears a single gold ring.
Following Sonic the Hedgehog (2006), Shadow’s Air Shoes’ red paint is scratched off on the front and his eyes have become more red-orange in color.
Shadow profile SG
Shadow’s profile in Sonic Generations.
Shadow is a brooding