Eyegore

Eyegore, also known as Rocklops, are creatures which appears in many games in the Zelda series, taking on slightly different properties each time.

Characteristics and Weaknesses
Their general appearance remains the same through the series, as do the strategies required to defeat them. Arrows often play a huge part in bringing down these creatures. They share many similarties and traits of Armos and Beamos enemies, and often appear in the same locations, implying that they were possibly created by the same ancient people as they were.

The Eyegore first appears in A Link to the Past, known as Rocklops outside Japan. They can be found within early Light World dungeons (Eastern Palace, Desert Palace, and also in Ganon's Tower). They are one of the strongest regular enemies in the game, dealing a whole heart worth of damage even early in the game, and are surprisingly fast. Green Rocklops can be defeated by using a sword, when their eye is open but they are incredibly durable. A thrown pot or an arrow straight in the eye results in a quick defeat. Red Rocklops are completely immune to all attacks when their eye is open except for the Bow's arrows. Two arrows will defeat a Red Rocklops.

Large Rocklops statues appear in various dungeons in both the Light and Dark World, and one in particular is key to solving a specific puzzle. Some of them also hold Telepathy Tiles.

Rocklops statues also appear throughout the dungeons in Link's Awakening, and while regular Rocklops do not appear, some of the statues shoot fire at Link from their eyes. These are known as Eye Guards and are a variation of the Stone Statue enemies. Much like in A Link to the Past, one of the Rocklops statues is key to a certain puzzle.

In Majora's Mask, they're bigger and more hulking, lying dormant until someone approaches them. Once awake, they will creep forward on powerful legs and fire beams at the offender from their single yellow eye. They will also slam the ground with their fists to send rocks flying at the enemy. When the offender has been warded off, they will quickly retreat to the point of origin and become dormant again. Eyegores can be stunned using the Bow, thusly leaving them open to further attack. Coincidentally, the Bow and the Hookshot can only be used to damage the brute when his eye is yellow. Eyegores return in Four Swords and Four Swords Adventures with similar properties, except they only activate when they're touched, instead of simply approached.

Variations
Eyegore Statues in The Minish Cap stand stationary in Castor Wilds until shot in the eye with an arrow from Link's bow. For this reason, they are often used block off areas in the marsh. Once provoked, the statues activate and begin to jump towards Link. The Eyegore Statues can destroyed by shooting them repeatedly in the eye with arrows. Link can also just easily run past the statue once it jumps out the way, saving time and arrows.

A Link to the Past comic
In the A Link to the Past comic, Link encounters a Rocklops during his visit to the Palace of Darkness. Although Link had been able to sneak around the palace using Zora's Mask as a disguise, he is eventually discovered by a Rocklops. The Rocklops warns Link of what could happen if he set off the firecorns in the palace, but the young hero disregards his warning and takes a Hinox's bomb belt that was wrapped around it. After the Rocklops summons Gleeocks to attack Link, the young hero makes the firecorn explode, destroying the entire palace and, with it, the Rocklops.

Trivia

 * In Majora's Mask, Eyegore is the only optional mini-boss that is in a dungeon.
 * The Seikizou part of Eyegore's Japanese name is a pun on the Japanese word for "stone statue", . Seiki (生気) means "living".