Dark Link is a shadowy doppelgänger of Link, the main protagonist in the 'Zeruda no Densetsu' (The Legend of Zelda) series. Serving as both an enemy and a test for Link, Dark Link mirrors Link's abilities and fighting style, challenging players with a difficult battle that tests their mastery of the game's mechanics. As a recurring character, Dark Link symbolizes the internal struggles of the hero and is often encountered as a boss or mini-boss, embodying the theme of confronting one’s own darkness.