Stone of Agony - Makes a Rumble Pack start "beating" when you're near a secret. Get 20 Gold Skultullas tokens and take them to the cursed family in Kakariko Village (See section 10)

Gerudo's Card - Allows you to walk around Gerudo's Fortress freely. Get by freeing all 4 carpenters in Gerudo's Fortress (See walkthrough)

The 3 Stones - Along with the Ocarina of Time and Song of Time, allows you to open the Door of Time in the Temple of Time to get the Master Sword and warp through - you guessed it - Time Get from beating the Deku Tree, Dodonogo's Cavern, and Jabu-Jabu's Belly levels.  (See walkthrough)

The Six Medallions - Needed to beat Gannondorf as adult Link Get by defeating the 5 temples and get the first one for free. (See walkthrough)