Princess Zelda (ゼルダ姫, Zerudā Himē) is the titular character of The Legend of Zelda series by Nintendo. She first appeared in the Super Smash Bros. series in the GameCube installment, Super Smash Bros. Melee, and returned in Super Smash Bros. Brawl. She is often seen as Link's damsel-in-distress, companion and friend, though in many installments of the series she is very capable of holding her own.
 Character Description
Zelda's first appearance was in the original Legend of Zelda game, where she served as the damsel-in-distress for Link to rescue from the evil monster known as Ganon. She has appeared in every installment of the Zelda series (with the exception of Link's Awakening where she was only mentioned briefly).
Since then, she has usually filled the role as the princess that must be rescued at some point in each game, but unlike Nintendo's other prominent damsel-in-distress Peach, Zelda more frequently takes a more active role in Link's final battles with Ganon, such as in The Wind Waker, Twilight Princess, and Spirit Tracks, where she attacks Ganondorf or Malladus (Spirit Tracks) with Light Arrows and has been shown to have very powerful magic abilities.
Like Link, Zelda's age changes throughout the different games. In some games, she is young girl, and in others, she is a young adult.
Zelda appeared as a playable character on two games for the CD-i, a little-known console that sold very few units. Because of its small market, most people mistakingly believe that her first playable appearance was in Super Smash Bros. Melee.
Each game has a different generation of Link and Zelda, explaining their differences in each game.
 In Super Smash Bros.
The games The Legend of Zelda, The Legend of Zelda: A Link to the Past, and The Legend of Zelda: Ocarina of Time are all mentioned, referencing her.
 In Super Smash Bros. Melee
 As a playable character
Zelda is a playable character, so she is featured on three trophies that can be acquired by beating each Mode with her on any difficulty. Her first trophy is earned by defeating the Classic mode as her on any difficulty; her second from the Adventure mode; her third from the All-Star mode.
Her classic trophy reads as follows:
 Princess Zelda
The crown princess of Hyrule. Zelda entrusted Link with the future of Hyrule after a revelation came to her in the world of dreams. She knows much about the Triforce; in fact, the only person who likely knows more about Triforce lore is Ganondorf himself, whom Zelda evaded in Ocarina of Time by transforming into her alter ego, Sheik.
 In Super Smash Bros. Brawl
Zelda has a trophy that is awarded each time the Classic mode is completed with Zelda on any difficulty, and several randomly-available ones. See Light Arrow for the trophy description of Zelda's Final Smash, and Sheik for trophies of her in that form:
 Princess Zelda
The princess of Hyrule. In other games, her role changes between titles. In Ocarina of Time, she was hunted by the would-be conqueror, Ganondorf. She deceived him, however, by adopting the persona of Sheik. In Twilight Princess, she surrendered to Zant and was held as his prisoner.
 Robed Zelda
The princess of Hyrule, loved and trusted by the people. When Hyrule is invaded by Zant from the Twilight Realm, Zelda is resolute in opposing him...but she chooses to protect her people and must surrender. From then on, she is imprisoned in the Twilight Hyrule Castle. In memory of the lost people of Hyrule, Zelda wears a black robe of mourning.
 Zelda (Wind Waker)
The rightful successor of the throne and descendant of the true royal bloodline of Hyrule. She strove to put an end to the ongoing battles with Ganondorf. As the bearer of the Triforce of Wisdom, she became a target of the resurrected Ganondorf. Although she was hidden in Hyrule Castle, Ganondorf managed to find and kidnap her.
A pirate captain who roams the seas in search of sunken treasure. Her disposition garners trust from her followers. Even she doesn't realize that she's THE Princess Zelda. Once Ganondorf learns of her existence, the King of Red Lions explains to her the truth about her true self. She is often recognized by her cute pose, where she crosses her arms and winks.