Dark Link, also known as Shadow Link or Link's Shadow, is an evil version of Link first appearing in The Adventure of Link and is one of the most popular enemy characters in the The Legend of Zelda universe, mostly due to his likeness and ability matching that of the protagonist, Link. It has been speculated that his popularity is so great in part because he imitates almost every move Link makes, as if Link is fighting himself rather than a separate entity; that is, Link and Dark Link are opposite in intentions, but perfectly matched in ability as well as action.