Armos Knight

Armos Knights are enormous versions of Armos that appear as enemies or bosses. Usually, they also have more complex behavior than ordinary Armos.

The Legend of Zelda: A Link to the Past
In The Legend of Zelda: A Link to the Past, six Armos Knights, alternatively called Armos Kings or Armor Knights, appear as the boss of the East Palace. They start out indigo, hopping around in tandem. First, they hop in a large circle, then they move in a line to the north side of the room and start moving across to the southern edge. After this, they begin circling again. While they can be defeated with the sword, it takes a large amount of hits to defeat one this way and runs the risk of Link getting hit from the proximity. By using the dungeon's bow, he can use arrows to attack them, bypassing their armor and defeating them with three hits each. When only one Armos Knight remains, it will turn red with anger at its comrades' defeat and start attacking Link directly, following him and attempting to slam down on him with higher, harder leaps. It takes the same amount of hits to defeat, however, and once it is defeated, Link will gain the Pendant of Courage.

Later, in Ganon's Tower, six more Armos Knights appear in an icy room. Despite the lack of friction, Link's improved arsenal still makes the fight much simpler than before. Once they are defeated, the path to the tower's Big Key opens.

The Legend of Zelda: Link's Awakening
In The Legend of Zelda: Link's Awakening, an Armos Knight, alternatively called a Giant Armos Knight, appears as the guardian of the southern Face Shrine. It looks like the ones in the previous game, but without the sword. It can hop after Link or do a giant slam, which creates a giant shockwave only avoidable through the Roc's Feather. The Armos Knight itself can be damaged with arrows or by hitting it with the sword in a dash from the Pegasus Boots. After enough hits, its shield disappears while its helmet splits open, revealing a pair of eyes in the darkness. It can now be damaged with the sword, but acts more frantic, and in later versions of the game, turns red. Once it is defeated, Link gains access to the ruins' final room, showing a plaque revealing the true nature of Koholint Island as well as holding the Face Key.

In the remake, the Armos Knight acts the same as before, though now it faces Link as it follows him.

The Legend of Zelda: The Wind Waker
In The Legend of Zelda: The Wind Waker, Armos Knights first appear in the Tower of the Gods, where two pairs of them appear as an optional encounter. Most activate when Link approaches, though one pair requires he play the Wind's Requiem on a wind symbol on the floor. In this game, Armos Knights appear as giant cycloptic statues with prominent chins and zigzagged mustaches. Upon activating, they hop after Link with a squinting eye and closed mouth, occasionally stopping to stretch the spikes in their base out for a few seconds. In doing so, they also open their eye and mouth, which are their weak points. To defeat one, Link must place a bomb in its open mouth. Additionally, shooting it with an arrow to its eye will cause it to become immobilized, giving Link more time to act. After the bomb explodes, they start spinning and rapidly hopping in a straight line to Link's direction at that moment before exploding, just like normal Armos in the game. The tower's boss, Gohdan works similar, and may be intended to have a connection.

As a side note, in the game's data, Armos Knights are considered the "normal" Armos while the final game's normal Armos are considered a "small" version, seemingly meaning their roles were altered in development.

The Legend of Zelda: Four Swords Adventures
In The Legend of Zelda: Four Swords Adventures, Armos Knights look like enlarged versions of the game's normal Armos, but act in a variety of ways. Like normal Armos, they let out an evil laugh. Two first appearr in Hyrule Castle, acting exactly the same as normal Armos. Later, in the Desert Temple, they appear completely invincible, but only hop after the Links when they are not looking at them. The temple later features a group of six hopping in a big circle, similar to in A Link to the Past. They will not be defeated until all the torches in the room are lit, made more difficult due to the presence of Beamos.

The Legend of Zelda: Twilight Princess
Although Armos Knights are not present in the final version of The Legend of Zelda: Twilight Princess, unused data features large, humanoid Armos capable of fighting with their fists, possibly intended to be Armos Knights.

BS Zelda no Densetsu Inishie no Sekiban
In BS Zelda no Densetsu Inishie no Sekiban, six Armos Knights appear as they do in A Link to the Past, appearing as the boss of the East Palace.

Cadence of Hyrule: Crypt of the NecroDancer featuring the Legend of Zelda
In Cadence of Hyrule: Crypt of the NecroDancer featuring the Legend of Zelda, a group of music-themed Armos Knights, called Guitarmos Knights, appear as a boss. They are led by an even larger one called the Bass Guitarmos Knight, though the group as a whole are also called "Bass Guitarmos Knights."

Trivia

 * Zelda Universe erroneously gives the name "Armos Knight" to the Soldiers from The Legend of Zelda: Link's Awakening.