Cheat: Infinite Rupees
If you dig to the left of the door to Link's house you will find 20 Rupees. Go into the house and then go outside to find the rupees over and over again.
Submitted by neelo
Unlockable: Mirror Shield
After you reunite the Gorons by fusing kinstones with all the cave walls, go into the cave of Gorons. This is after you get the Four Sword and fuse kinstones with the Goron on the right. The Big Goron on top of Veil Falls will awaken. Go up and talk to him and defeat Vaati. After you defeat Vaati, go back to the big Goron and he'll ask you if he can eat your shield. If you let him and beat the game again, come back to him and he'll give you the Mirror Shield.
Submitted by Alex Hikari
Unlock Magic Boomerang
To get the magic boomerang, fuse kinstones with all the Tingle brothers-one east of your house, one up a cave in Lon-Lon ranch, one at Lake Hylia near stockwells home,and one at the royal valley crypt south exit.
Submitted by Fire_Emblem_Master
Unlock Light Arrows
To get the light arrows, fuse kinstones until you open up a portal to the wind tribes house near your house(try to open up the portal before going to mt.Crenel). Heal the old man in the bed by sucking up the ghost near him with your gust jar. On your way to the wind temple, go to him and he will give you light arrows.
Submitted by Fire_Emblem_Master
Unlock Six More Figurines
When you go to Carlov's figurine shop, you will notice that there are about 130 figurines to collect. When you beat the game, six more figurines will be made available.
Submitted by -DaRK SaiNt-
add more if you know about any!