So you’ve picked up The Legend of Zelda: Skyward Sword on day one, good for you. By now you have probably noticed that Link doesn’t start with the greatest of shield, but not to worry because as the game progresses you will be able to purchase newer and better shields from the bazaar in Skyloft.
The thing is though, you won’t be able to simply buy the best shield in the game. But not to worry because we have the secret and we’re not into keeping things to ourselves. Like we mentioned earlier, as you play through the game you will be able to purchase newer and better shields from the bazaar. Toward the end of the game though, after you encounter the Thunder Dragon begin playing through the Boss Rush Mode and once you have beaten 8 of the bosses, quit and he will reward you with the legendary Hylian Shield.
Skyward Sword - How to Obtain the Best Shield,