History UniqueEnemy / HollowKnight

* The path to the Sharp Shadow charm has a short variant of the [[CreepyCentipedes Garpede]] not seen elsewhere.

* The Menderbug crosses this trope with MetalSlime, since he could only spawn at a 2% chance if you break the sign at the entrance of the Forgotten Crossroads below Dirtmouth and re-enter. He will notice the Knight and quickly fly away. Since he is fast and the Knight is momentarily motionless from taking the fall, the only way to damage and kill the Menderbug is to use the Desolate Dive/Descending Dark. Doing so will unlock the door to his house and read his diary.
** A second less-known way is [[https://www.youtube.com/watch?v=N2EmyHdgSC8&t=2m pausing the moment you enter the zone if you see him]], which will cancel the fall animation and allow you to attack him normally.

* The False Knight's mace sprouts legs and scurries off shortly after you win the BossBattle. You can't kill it, but you can bat it around a bit, and it even says something if you hit it with the Dream Nail (though it's unlikely you'll have that so early).

* The two Mourning Maggots are encountered together and don't respawn.

* Certain enemies in specified spawn locations have modified Geo drop values compared to all other enemies of their type.
** The Mantis Traitors in the Traitor Lord's room do not drop Geo.
** All other Winged Sentries drop 12 Geo when defeated, except for one Winged Sentry that drops 35 Geo near the entrance to Isma's Grove.
** All other Lancer Sentries drop 12 Geo when defeated, except for the first instance of a single Lance Sentry in the Watcher's Spire that drops only 2 Geo.
** While all other Husk Dandies usually drop 9 Geo upon defeat, there's a Husk Dandy near the Watcher's Spire bench that will drop 25 Geo.
** All other Furious Vengeflies drop 20 Geo when defeated. However, the first encounter with a Furious Vengefly in the east side of the False Knight's arena will drop 55 Geo.
* Only the Gruz Mother encountered in the Forgotten Crossroads spawns [[ChestBurster Gruzzers bursting from her chest]] when she dies. The Gruz Mothers in the Colosseum of Fools and in the Godhome do not have this mechanic.
* Crystallized Husks, a slightly tougher variant of the Husk Miners with a laser attack, are only fought in the uppermost passage of Crystal Peak leading to Hallownest's Crown.
* Carver Hatchers are only found in the Failed Tramway section of Deepnest.
* Lesser Mawleks, a {{mook}} counterpart to the Brooding Mawlek boss, only appear in one segment of the Ancient Basin, and the player will only fight three or four at most to retrieve the chunk of Pale Ore from said area.
* The Brooding Mawlek encountered in the Colosseum of Fools [[https://vignette.wikia.nocookie.net/hollowknight/images/c/ca/Mawlek_Colosseum.png/revision/latest?cb=20190502165907 is smaller and thinner]] than the one encountered in the Forgotten Crossroads. This is purely cosmetic and does not affect much on its mechanics.

* Only two Alubas (dragonfly-like bugs) appear in the game, one at the Lake of Unn, the other outside the White Lady's den. They don't attack, and exist solely to fill out the [[MonsterCompendium Hunter's Journal]].

* The Husk Guard is only encountered alive in two instances, both in Forgotten Crossroads, one of which stops respawning after the area becomes infected, although corpses of them are seen in Fog Canyon.

* [[spoiler:Infected Myla]] shares the attacks and appearance of a Husk Miner, though [[spoiler:she has unique lines when hit with the Dream Nail, as well as a unique death cry. She also does not respawn upon being slain.]]
* There is a lone Moss Knight standing at the ledge near the Lake of Unn. It only attacks the Knight once you provoke it, has a unique Dream Nail dialogue ("...She is calling... Home so close..."), and doesn't respawn once killed.
* There is one Cowardly Husk on the top of the Watcher's spire that has a unique dream nail dialogue. In the game files, it is called "WATCHERS_BUTLER" implying that this Husk is Lurien's butler.
-->Master...so long... ...I serve... ...I will watch over you... ...Master...light calls...
* There is a non-hostile Sturdy Fool that can be found bathing in the Warriors' Pit section of the Colosseum of Fools. You can strike the nail to splash the liquid and make it grunt, or you can use the Dream Nail to read its unique dialogue.
-->...Why does it disturb me?...

* The Stalking Devout guarding Herrah's chamber doesn't respawn when killed, even after you sit on a bench.
* The Grub Mimic in the Colosseum of Fools cannot be Dream Nailed. Otherwise if it can be used as an infinite source of soul just like the other Grub Mimics, it would be too easy for the Knight to heal in the colosseum.

* Mossy Vagabonds are only found in a DisconnectedSideArea of the Queen's Gardens accessible from the Fungal Wastes, accompanying the Moss Prophet. If you didn't discover their hideout before defeating the Broken Vessel, they'll all be dead from the Infection, though you can still inspect their corpses for the MonsterCompendium entry.

** UniqueEnemy: All other Furious Vengeflies drop 20 Geo when defeated. However, the first encounter with a Furious Vengefly in the east side of the False Knight's arena will drop 55 Geo.

* The Mantis Traitors in the Traitor Lord's room do not drop Geo.

* There is a lone Moss Knight standing at the ledge near the Lake of Unn. It only attacks the Knight once you provoke it, it has a unique Dream Nail dialogue ("...She is calling... Home so close..."), and doesn't respawn once killed.

* Although not technically a boss, the Pale Lurker's fight locks you in the room, requiring you to defeat her in order to exit. She only flees from you and leaves traps behind to slow you down, but she doesn't have a large amount of health comparable to bosses. She also has a MightyRoar intro, but without the BossSubtitles. Her death animation is also fast, like a typical mook. Lastly, the Pale Lurker is one of the few enemies in the game that are scripted to drop an item upon death. Alas, there's only one of her in the secret area of the Colosseum of Fools.

* Although not technically a boss, the Pale Lurker's fight locks you in the room, requiring you to defeat her in order to exit. She only flees at you and leaves traps behind to slow you down, but she doesn't have a large amount of health comparable to bosses. She also has a MightyRoar intro, but without the BossSubtitles. Her death animation is also fast, like a typical mook. Alas, there's only one of her in the secret area of the Colosseum of Fools.

* The Menderbug crosses this trope with MetalSlime, since he could only spawn at a 2% chance if you break the sign at the entrance of the Forgotten Crossroads below Dirtmouth and re-enter. He will notice the Knight and quickly fly away. Since he is fast and the Knight is momentarily motionless from taking the fall, the only way to damage and kill the Menderbug is to use the Desolate Dive/Descending Dark. Doing so will unlock the door to his house and read his diary.

* The Gorgeous Husk is a unique gold-plated Husk found in a well-hidden room at the City Of Tears' east end. It has higher HP than other Husk variants, but is not tough enough to qualify as a boss or miniboss.

* There is a lone Moss Knight standing at the ledge near the Lake of Unn. It only attacks the Knight once you provoke it, it has a unique Dream Nail dialogue ("...She is calling... Home so close..."), and doesn't respawn once killed.

* The two Husk Warriors in the hallway above the Crossroads Stag Station are the only appearance of their kind.

* The Husk Guard is only encountered alive in two instances, both in Forgotten Crossroads, although corpses of them are seen in Fog Canyon.