Moldorm
Moldorm (モルドアーム, Morudoaamu) was originally a semi-rare worm-like dungeon enemy in The Legend of Zelda, but later gained fame when large members of the species featured as bosses in A Link to the Past, Link's Awakening, and Four Swords Adventures, with the normal-sized members making further appearances in games such as The Minish Cap and Twilight Princess.
The Legend of Zelda
Moldorms are semi-rare enemies found in several of the labyrinths in the game. In-game, they appear like a chain of fireballs, whereas in the official art, they appear to look like giant earthworms. When struck, they shorten by one segment.
A Link to the Past
Moldorm makes it's home inside the Tower of Hera and guards the Pendant of Wisdom, the third and final pendant Link must collect.This is a very odd boss due to the fact that the fight is not enclosed and there is no opening sequence. Moldorm is easy to defeat; six swings of your sword to the end of his tail will kill him. However, each swing makes Moldorm move more rapidly. Adding to the difficulty, he is situated on a platform high atop the Tower. If Link is knocked off the platform, he plummets to the floor below, and must restart the battle. For winning, Link gains the Pendant of Wisdom, and access to the Legendary Blade: The Master Sword. Moldorm makes an reappearance in Ganon's Tower, only the floor is shaped differently this time. The Golden Sword will kill Moldorm in two hits. This Moldorm is known as デグテール Degu Tail in the Japanese game.
Link's Awakening
Moldorm also is the final boss of the Tail Cave during the adventure in Link's Awakening. He guards the Full Moon Cello, one of the Eight Instruments of the Siren that Link must collect to awaken the Wind Fish on Koholint Island. He is defeated the same way as in A Link to the Past, by striking it's tail, without falling off the platform. However, you must only strike the tail 4 times instead of 6, making it much easier. Nightmare, the games final boss, takes on the Moldorm as one of his six forms, however, this battle is surrounded by walls rather than holes making the battle somewhat easier. This Moldorm is also known as デグテール Degu Tail in the Japanese game.
Boss Strategy - Equip the Roc's Feather and jump over to his tail every time he seems a bit perpendicular. After jumping up and striking him once repeat it by jumping back where you were. Always evade his head and jump perpendicular to him, and as you jump move towards his tail and swing as fast as possible. If you fall, exit the area and you'll pop up in front of the boss door. After four hits he will be defeated.
Four Swords Adventures
Moldorm was a boss in Four Sword's Adventures. The strategy was then the same, with the exception that his tail changed color after each strike. The player with the same color where then the only one who could inflict damage on the boss.
The Wind Waker
Moldorm appears in this game as the third and final form of the boss Puppet Ganon. The strategy to defeat remains the same, but Moldorm moves too fast to use your sword. Instead you must shoot the tip of its tail with light arrows.This Moldorm is said to resemble a fish.
The Minish Cap
Quote from The Minish Cap Moldorm figurine:
"Appears in various areas. These guys move quickly and randomly. Trap them in a corner and take them out quickly."
Moldorm in Twilight Princess
Moldorms appear in Twilight Princess in the Gerudo Desert, and a few rooms inside the Arbiter's Grounds, as the enemies jumping from the sand and trying to land on you. They look like their previous forms, except much shorter, and purple. To defeat them, use Link's Clawshot to pull them out of the ground, then kill them with your sword.
These Moldorms are similar to the Pokemon Gible in both appearence and wild attack pattern (hide in sand and leap out to attack).
Phantom Hourglass
Moldorms usually appear in this game as part of enemy scenarios in dungeons. Their look has been revamped a bit; they now look more like centipedes than worms. The strategy remains the same, though. Several sword strikes or one arrow to a Moldorm's bright red tail will kill it.