Dark Link

Dark Link (also known as Shadow Link or Link's Shadow; in Japan, simply as Doppelgänger) is the shadowy, evil counterpart of Link. In The Legend of Zelda series, Dark Link first appears in Zelda II: The Adventure of Link as the final boss. In the Super Smash Bros. series, Dark Link first appears as an enemy in Super Smash Bros. Melee. Since Super Smash Bros. Brawl, Dark Link has appeared as an alternate costume for Link.

Super Smash Bros. Melee
In Super Smash Bros. Melee, Dark Link is fought as an opponent in Lv. 18: Link's Adventure. In the battle, the player controls a red-clad Link, who has two extra lives. The fighter must defeat Dark Link, who also has two lives. The two swordsmen are fought at the Temple, with no time limit. This Event Match is a reference to the final boss fight against Dark Link in Zelda II: The Adventure of Link.

Super Smash Bros. Brawl
In Super Smash Bros. Brawl, Dark Link returns in two Event Matches. The first, #18 Dark Link Duel, is similar to the match from Super Smash Bros. Melee, but it is fought on the Bridge of Eldin instead, and is a stamina match rather than using lives. The second, #7 Battle of the Dark Sides, is the same as Dark Link Duel, but with the addition of Samus Aran and Dark Samus assisting Link and Dark Link, respectively.

Versions of Dark Link also appear as palette swaps for both Link and Toon Link. Link's is based on the interlopers from The Legend of Zelda: Twilight Princess, whereas Toon Link's is based off Shadow Link from The Legend of Zelda: Four Swords Adventures.

Super Smash Bros for 3DS / Wii U
In Super Smash Bros. for Nintendo 3DS and Super Smash Bros. for Wii U, one of Link and Toon Link's other costumes include one reminiscent of Dark Link.

Super Smash Bros. Ultimate
In Super Smash Bros. Ultimate, Dark Link returns as an alternate costume for both Link and Toon Link and as a new one for Young Link.