Kokiri Sword

The Kokiri Sword is the default sword Link possesses in both and. It is also the weakest sword in both games.

Ocarina of Time
In Ocarina of Time, Link must obtain the Kokiri Sword before Mido allows him to visit the Great Deku Tree. The young hero can find the Kokiri Sword hidden away in a chest inside the Hole of "Z", which is located in the Forest Training Center. This is the only sword Link can wield as a child and the very weakest. Once he is an adult, he uses the Master Sword instead.

Majora's Mask
The very same Kokiri Sword is equipped by default at the beginning of. It is hindered both by a short range and a lack of power, but can be upgraded to the temporary Razor Sword and then upgrade again into the permanent Gilded Sword by taking it to the Mountain Smithy in Mountain Village. Although Link begins the game with the Kokiri Sword, he is unable to use it when he is first transformed into a Deku Scrub by the Skull Kid.

Interestingly, the hilt and guard of the Kokiri Sword changed from Ocarina of Time to Majora's Mask.

Ocarina of Time Manga
In the, Link receives the Kokiri Sword from Mido after they defeat Gohma. It is also used to carve a Deku Shield out of the Great Deku Tree's wood.

Super Smash Bros. Melee
The Kokiri Sword appears in its Ocarina of Time incarnation as the blade wielded by Young Link in.

Trivia

 * Although it is stated in Ocarina of Time that Link is merely "borrowing" the Kokiri Sword, he still carries the same weapon into the sequel. However, given the difference in design from one game to the other, they in fact may be different swords that merely share a name.