Overworld Enemies
Armos: Inert suits of armor scattered around the Overworld that will come to life if Link touches them. They move at varying speeds, from extremely slow to extremely fast. They drop no treasure, but occasionally there is a secret passage or other item hidden beneath them that will be revealed when they begin to move.
Gheeni: Ghost present in the cemetery. There is one Gheeni to begin with in each area of the graveyard, and this is the "master" and the only one that is vulnerable to attack. Other Gheeni will appear as Link touches tombstones. All Gheeni on the screen will die when the master is defeated. If link touches a tombstone after the master is defeated, more Gheeni will appear, and these will be invulnerable to attack.
Leever: Somewhat cylindrical enemy capable of burrowing into the ground and reappearing elsewhere. Blue variety reappears randomly. Red variety always reappears a few spaces directly ahead of Link.
Lynel: Powerful enemy resembling a half-man, half-lion. They throw deadly swords that only the magic shield can deflect. Blue variety is significantly stronger, and a little faster, than Red variety.
Moblin: These monsters with bulldog faces are common in the forests of Hyrule. They shoot common arrows. Blue variety is more powerful than red and may drop Bombs as treasure.
Octorok: Common enemy and the first enemy that Link is likely to encounter. They shoot rocks from their snout which can be blocked by the basic Shield. Red variety is weak. Blue variety is slightly tougher. Blue Octoroks may drop Bombs as treasure when they are defeated.
Peahat: An enemy resembling a moving flower. They fly around and cannot be attacked while they spin. They are only vulnerable when they land and stand still, which never lasts for very long.
Rocks: Falling rocks common near Death Mountain in the northern Overworld. They cannot be killed or blocked, only dodged. They tend to fall in groups of three and will follow Link as much as possible, but their movement is limited.
Tektite : Spider-like enemy that jumps unpredictably. They are capable of jumping over all terrain, including mountains and cliffs and other areas Link cannot get to. Blue variety may drop Bombs as treasure, but both usually drop a rupee as treasure.
Zora : An enemy commonly present in the waters of Hyrule. Submerges and reappears, each time shooting a fireball that can only be blocked with the Magical Shield. They can be killed, but they must be eliminated before the return to the water or they gain all of their strength back.
Underworld Enemies
Bubble: Glowing enemies that are invulnerable to attack. If Link is touched by one, he will not be able to swing his sword for a few seconds. In the Second Quest, there are Red and Blue varieties. If Link is touched by a Red Bubble, he will be unable to swing his sword until he touches a Blue Bubble.
Darknut: Powerful armored knights that are invulnerable to attack from the front and to the Boomerang. They are, however, vulnerable to attacks from the side and back. Bombs can also be effective. Red variety is weaker than Blue variety.
Gel: Very weak enemy with the shape of a tear drop. They never drop treasure, but they can be killed if hit with the boomerang.
Gibido : Slow moving mummies with a high defense that like to continuously run in to you. They can take several hits, but relatively weak offensively.
Goriya : Giant walking rat type creatures that throw boomerangs, which you can block with your shield as long as you are not attacking. Blue variety is significantly stronger than Red variety.
Keese : Bats that zoom around the room attempting to bite you. Like Gels, they never drop treasure, but they can be killed if hit with the boomerang.
Lanmola: Fast-moving worm-like enemy. Attack shorten it's length until only the head remains. The Magical Rod is an effective weapon to use, especially after Link has obtained the Magic Book. Blue variety is much faster than Red variety.
Like-Like : A tube like enemy with a penchant for metal. If this enemy grabs hold of Link, it may devour Link's Magical Shield, leaving him with an ordinary shield.
Moldorm : Relatively slow-moving wormlike enemy. Appears in a "worm" of five or six segments that resemble fireballs. Attacking it with the sword decreases it's length until it's defeated.
Patra: Present only in Level 9. Appears as a circular swarm of flying eyeballs with a larger flying eyeball in the center. The swarm moves relatively slowly around the room, but the individual eyes move very quickly and can force Link into a corner if he isn't careful. The center eye is invulnerable until the satellites have been defeated.
Pols Voice: Big-eared enemy similar in appearance to a rabbit's head. They hop around and can jump over or on top of barriers. They have a very strong defense, but they are particularly vulnerable to one weapon... the arrow. Alternatively, in the Famicom Disk version, you can blow into the microphone from the second controller to eliminate them (only works in the first Famicom console).
Rope : A snake-like enemy that make nests in certain rooms of the dungeons. They will suddenly speed up and charge toward Link if they line up with him.
Stalfos : Enchanted skeletons that wander around in dungeon rooms. They carry a sword in each bony hand and can hurt you if they touch you. In the Second Quest, Stalfos are able to throw swords.
Traps: Spiked jewels that will quickly slam toward Link if he walks in front of them. They are laid out by many of the dungeon room entrances and cannot be destroyed.
Wallmaster: Hand-shaped enemy that materializes out of walls. Relatively weak, but if it grabs hold of Link it will return him to the beginning of the dungeon.
Wizzrobe: Powerful enemy resembling a robed wizard. They are capable of shooting powerful magical blasts. The red variety teleports about the room, and is somewhat weaker than the blue variety who can levitate over water or solid objects.
Vire: A bouncing winged demon. If it is hit with an attack that does not instantly kill it, it will split into two red Keeses. These Keeses are otherwise identical to the more common variety.
Zol : An enemy resembling a blob with eyes. If it is hit with an attack that does not instantly kill it, it will split into two Gels.