Nightmare

The Nightmares are the end boss of The Legend of Zelda: Link's Awakening. These are hidden inside the Wind Fish's Egg. To reach them you must enter the Wind Fish's Egg after collecting all the instruments from the 8 levels on Koholint Island. Once in the wind fish's egg you must go forward until you drop down to a maze like area. In this maze you must go Left, Left, Up, Right, Right, Up, Left, Up. You will then reach a hole which you must jump down. As soon as you jump down the Nightmares start speaking, they say: "We were born of nightmares... To take over this world, we made the Wind Fish sleep endlessly! If the Wind Fish doesn't wake up, this island will never disappear! We would have been the masters of this place...But you had to come here and disrupt our plans! Heh heh! You can never defeat us!!! Let's rumble!". Then the fight begins.

Appearance
The Nightmares come in six different forms, these bosses form right after you slay the one before it.

Giant Blob

This form of the boss, is basically a giant blob which hops around the room. To defeat this boss, you will need to sprinkle Magic Powder on it.

Agahnim

This isn't the same person as in Link to the Past. This is merely the Nightmares made to look like Agahnim, the evil wizard from Link to the past. To defeat the boss, you must hit the energy balls he fires at you back at him.

Moldorm

This is a re-creation of the boss from Tail Cave. You attack him the same way; by hitting him in the tail. Although this time you must hit Moldorm more times.

Ganon

As with Agahnim, this is not the real Ganon, it is in fact the Nightmares made to look like Ganon. In this game he appears as a creature twirling an axe above his head while flaming bats are conjured up and fly at you, he also throws his double sided axe at you. The easiest way to defeat him is to charge at him with your pegasus boots and sword.

Lanmola

Lanmola is a fast moving blob that bumps into you to attack you. To defeat Lanmola you only have to hit Lanmola once with either the Hookshot, Magic Rod or Boomerang.

Dethl

This is the final boss of the game. This boss is a one-eyed creature with swinging arms. To defeat this creature you must fire arrows into it's eye, that opens and closes or you could throw your boomerang at the very centre of it's eye to kill it in one.