Anti-Fairy
Threat: 3/10
Speed: Medium
Attacks: Contact: 
Defense: Invincible to everything but Magic Powder, and the Boomerang. Magic Powder:1 sprinkle, Boomerang:1 throw
Description: Commonly found in dungeons, but not found in the overworld at all. These enemies will move around aimlessly bumping against walls and the edge of the screen. I recommend just jumping over them using Roc's Feather if your in a small passageway.
Anti-Kirby
Threat: 3/10
Speed: Slow/Medium/Fast
Attacks: Contact: 
Suction:
Defense: Invincible to everything but Bombs, the Boomerang, and the Magic Rod.
Description: There is only one of these in the entire game, and it's in Eagle's Tower. I recommend just ignoring it, but if you want to attack it I recommend using the boomerang from afar.
Arm Mimic
Threat: 7/10
Speed: Medium
Attacks: Contact:
Defense: L-1 Sword: 1 Hit L-2 Sword: 1 Hit Pegasus Boots: 1 Dash
Description: Arm Mimics are not very common. I believe the reason they are scarce is due to the fact that they can be very annoying to encounter. They mirror your every move. If you move up, they move down, If you move left they move right, and visa-versa. I recommend moving up to them slowly and slashing until they are destroyed.
Armos
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Threat: 7/10
Speed: Medium/Slow
Attacks: Contact:
Defense: Invincible to everything but Bombs, Arrows, and the Boomerang (Hookshot freezes it). Bombs: 2 explosions Arrows: 2 shots Boomerang: 2 throws
Description: Armos come to life when you come in contact with them or walk by them. They can be very threatening due to there speed and damage ratio. The easiest thing to do is to is shoot them with two arrows.
Ball and Chain Trooper
Threat: 8/10
Speed: Slow
Attacks: Contact:
Spiked Ball:
Defense: L-1 Sword: 8 Hits L-2 Sword: 4 Hits Bombs: 2 Explosions Arrows: 2 Shots
Description: As his name implies this enemy has a ball and chain that he uses to hurt you. Whenever this guy hurls his ball and chain at you dodge it and slash him with your sword. DO NOT attempt to slash him multiple times, you could get hurt many times doing this. You have to be patient when fighting this enemy.
Beamos
Threat: 3/10
Speed: Medium
Attacks: Beam:
Contact:
Defense: Invincible
Description: A live statue that shoots a beam whenever it sees you. It's no use fighting it since it's invincible, so just run away from it when it sees you. If you have Roc's Feather, I recommend using it to jump over the beam.
Beetle
Threat: 1/10
Speed: Slow
Attacks: Contact:
Defense: L-1 Sword: 1 hit, L-2 Sword: 1 hit, L-3 Sword: 1 hit
Description: Basically the weakest enemy in the entire game. Beetles don't even try to attack you, and the have the second lowest damage ratio. Just slash it once with your sword to kill it.
Blade Trap
Threat: 3/10
Speed: To Target: Fast, Retraction: Slow
Attacks: Dash:
Defense: Invincible
Description: This enemy will dash out at you trying to hurt you, just like everything else. I recommend just jumping over them when they dash out.