Dark Samus

Dark Samus is a character from Super Smash Bros. Brawl. She is a completely black palette swap of the playable Samus, and thus shares all of her moves. Though she is clearly based on a character from the Metroid series, she shares little in common with the Metroid character other than being a dark version of Samus.

Dark Samus is faced as one of the opponents in Co-Op Event Match 7: Battle of the Dark Sides. In this Event Match, she and Dark Link are fought by the players, who play as the normal Link and Samus. The match is held on the Bridge of Eldin, and all four characters have 200 Stamina each.

Trivia

 * The real Dark Samus also makes appearances in Super Smash Bros. Brawl, as both a trophy and Sticker.