Dungeon One - "The Eagle"
The Dungeon gets its name since the map is shaped like an eagle. The two key items to obtain here is the bow and boomerang. The boss, aquamentus, is fairly easy.

Dungeon Boss : Aquamentus
The easiest way to kill this guy is to have all hearts and use your sword to zap him. If you don't just run up to him quickly and slice him in the head. Keep doing this, but at the same time try and avoid the fireballs he shoots at you. It shouldn't take but a few hits to kill him. Once he is dead, claim your heart container and go into the next room to claim your piece of Triforce.

Dungeon Two - "The Moon"
The second dungeon, filled with ropes (snake like creatures) and has a very blue theme. The key item here is the Magic Boomerang. You should stock in bombs before entering this dungeon, since you will need them for the boss, Dodongo.
Dungeon Boss : Dodongo
The quickest way to kill this boss is to intercept his every move and place a bomb right in front of him. If you get it right, he will eat the bomb. It will only take two bombs to kill him. Once he is dead claim you heart container and piece of Triforce.

Dungeon Three - "The Manji"
The key item here is the raft, which is needed to access dungeon four. This dungeon introduces the enemy darknut, which can be a hard opponent at times. The dungeons boss manhandla is another boss you may need bombs to defeat.
Dungeon Boss - Manhandla
You will need bombs to destroy this boss. Try and run up to him and throw a bomb a run away. If you get it right, it may destroy parts of him. Every time you hit him and moves a lot quicker. If you are lucky, you can kill him with one bomb. Once defeated, claim your heart and piece of Triforce.

Dungeon Four - "The Snake"
You will need the raft to access this dungeon. This is the first dungeon you will need to use the candle to see your way around. The key item to find here is the stepladder. The boss, the Gleeok, is a dragon looking creature with two heads.
Dungeon Boss - Gleeok
The easiest way in my opinion to kill this guy is to just stab each head back and forth (unless you have full hearts, then you can just zap its heads). Just watch out for the fireballs. Once you take off one head, don't even bother trying to kill the flying head, just go for the one still in tact. Once he is defeated claim your heart and piece of triforce.

Dungeon Five - "The Lizard"
The "secret" dungeon. Iam saying that since it's a small maze to find it. Again you will be needing your candle to light up rooms. This dungeon also introduces a few new enemies like the gibdo and polsvoice. The key item to find here is the whistle, which is needed to destroy the boss, Digdogger.
Dungeon Boss - Digdogger
To kill Digdogger, all you have to do is blow your whistle and he will get smaller. You can zap him if you have anough hearts or just run up to him and stab him. It only takes like three hits to kill him. Claim your heart and go up to get the piece of triforce.

Dungeon Six - "The Dragon"

Dungeon Seven - "The Demon"

Dungeon Eight - "The Lion"

Dungeon Nine - "Death Mountain (Spectacle Rock)"