Darknuts are recurring enemies in The Legend of Zelda series, that debuted in the original The Legend of Zelda.
The Darknut resembles a large knight, equipped with heavy armor and a large sword, and a wide shield. Darknuts are notoriously difficult to defeat, and are considered by many fans as the hardest non-boss/non-miniboss enemy in games in which they appear. These foes share trite similarities to the Iron Knuckle, though there are a few discernible differences, one being the Gothic appearance of Darknut's armor as opposed to the somewhat Eastern appearance of the Iron Knuckle's armor. Apart from that, the two have never appeared in a game together. Additionally, since Ocarina of Time, Iron Knuckles have wielded two-handed axes while Darknuts prefer swords or maces. Early Armos Knights also mimic the behavior of the Darknut.
These enemies, though sometimes denoted in strength by differences in coloration, are all masters of swordfighting, seen most vividly during battles fought with them in The Wind Waker and Twilight Princess, where the differences in size between Link and the Darknut in three dimensions further emphasizes this accurate behavior. Darknuts are known to charge at Link, as in Link's Awakening, parry and block his sword strikes, as in The Wind Waker, and even inhibit a highly mobile second form, most notable in Twilight Princess.