More items:
-Fairy Sword: Different than the one in LoZ:MM, this sword gives you health equivalent to the amount of damage it does when it strikes an enemy. It also takes 2 hands to yeild & therefore won't be able to use your shield to block.
-Wealth Badge 1: Gives you a discount in various shops so you pay 75% of the original price.
-Wealth Badge 2: Allows you to pay only 50% of the original price in shops.
-Megaton Hammer: Make this item return. However, there should also be an item called "the Quake Scroll" which gives it extra power. When you have this scroll, you can charge the hammer just like you can charge the Gale Boomerang. This however consumes magic. When released, the hammer strikes the ground heavily, stunning & damaging nearby enemies.
-Thief's Hook: When attached to the hookshot, it allows you to pull items away from enemies, therefore stealing items from them. Once you obtain this, it's easy to get 5-piece rupees, hearts, bombs, arrows, & magic jars--just use your hookshot combined with this on any enemy & see what you get!
Lightening Rod: When used, a bolt of electricity appears from this magic rod. It consumes magic. This is used as not only a weapon, but often for various puzzles.
Crowbar: When used, it can activate levers that have a broken handle or pry open doors that aren't locked but are stuck & can therefore be jarred open with this item.
Cane of Somaria: When used, a block with the Temple of Time symbol will appear (can only be used once per room). So you press the button to use it and a blue block appears. You can then pick up this block and carry it. The block can be used to hold down triggers that require something heavy on it. Link can also climb on it so he can use it to reach platforms he couldn't otherwise reach. When thrown, the block falls but does not break.
Bomb Flower: This should be its own item--what it does is act like a remote bomb (sorta). You press the button once to use it and it appears in your hands. You can run around holding it, drop it at your feet, or throw it. It only explodes if you shoot it with an arrow. You can also place multiple bomb flowers at once. This would be useful for puzzles where you need to bomb multiple obstacles at once or cause a series of explosions (like the staircase in Dodongo's Cavern in LoZ:OoT)
Ladder: This is an item that you can only use once per screen & it allows you to place a ladder on walls or across gaps (so it also can only be used at certain spots) This allows access to otherwise restricted areas.
Poison-Proof Tunic: A puprle-colored tunic that allows you to swim in poisonous water or wander around toxic environments safely.