The Master Sword in The Legend of Zelda
The Master Sword is a powerful blade appearing in most Zelda games. It is usually acquired later in the respective game. It has the power to abolish evil, and it Ocarina of Time, can transport you through time (to the future when pulling it from its pedestal in the Temple of Time and wielding it, and to the past by returning the blade to the pedestal). In Skyward Sword, it is revealed that the Master Sword, (Called the True Master Sword in that game.) is created by tempering the Goddess Sword in the three sacred flames from the Goddess Sword to the Goddess Longsword using Farore´s Flame in Faron Woods, to the Goddess Whitesword with Nayru´s Flame aboard the Sandship, to the Master Sword with Din´s Flame in Eldin Volcano, and finally to the True Master Sword (the design shown on this page.) with the blessing of the goddess, Hylia, in the Sealed Temple.
The Master Sword in the Super Smash Bros. series
Link wields the Master Sword with his left hand in all three Super Smash Bros. games. He uses the Master Sword to perform his standard A attacks and his up special. The Master Sword also makes an appearance as a trophy in Melee. There was an error on the Master Sword trophy however as it stated that the Master Sword first appeared in The Legend of Zelda: Ocarina of Time. However, later versions of Melee corrected this error. Young Link does not wield the Master Sword, instead opting for the Kokiri Sword. Toon Link wields The Wind Waker version of the Master Sword in Super Smash Bros. Brawl. Also, Link is seen drawing the Master Sword yet again in a cutscene in the Subspace Emissary. Even though the trophy description in Super Smash Bros. Melee says that the Master Sword is the most powerful blade that Link can wield, it's actually the two-handed sword, the Biggoron's Sword from Ocarina of Time.
The Master Sword varies a bit between titles in the Legend of Zelda series, but it's generally the most powerful blade that Link can carry. It's a magical weapon that can be wielded only by a true hero, and, as its name implies, it's the weapon of choice in decisive battles. At the end of The Legend of Zelda: Ocarina of Time, Link returned it to its stone pedestal.
Game: The Legend of Zelda: Ocarina of Time [11/98]
Game: The Legend of Zelda: A Link to the Past [4/92] (Corrected re-release version)