Ultima Weapon

Ultima Weapons are weapons in the ZeldaKingdomHearts series. They are by one of the most powerful weapons in the series. They are often obtained by being created with materials or by defeating optional boss's. In Dark Dreams,  both Link and Sora obtain thiers by creating them from materials founded by enemies such as Orichulum+ and Platinum Crystal. In Emerald Sword, the Ultima Weapon is obtained by defeating the Elite Assassian in the west side of Termina Town. In addition, Clera, Steven, and Kyson obtain thier Ultima Weapon's: Thief's Knife(Clera), Mage's Staff(Steven), and Knight's Sword(Kyson), by defeating Galleom in a allyway that is available after beating the game at least once. It is unknown if the Ultima Weapon will be in Hero's Return, but will return for both Link and Sora in Destiny's Return.

Trivia

 * Link's Ultima Weapon is based off of Cloud's Ultima Weapon from the Final Fantasy series.
 * In Dark Dreams, Link's Ultima Weapon is called "Ultima Sword" instead, giving it the same abtributes with a different name.
 * The method in which both Link and his partners Ultima Weapons are obtained in Emerald Sword is exactly how they are obtained by Sora and Riku in Kingdom Hearts 3D Dream Drop Distance; by defeating Julius, the Ultima Weapon is obtained, in other cases, this is how the Ultima Weapon is obtained in Emerald Sword for Link and his partners.