All Bosses Checklist for Hollow Knight: Silksong

Track and defeat all bosses in Hollow Knight: Silksong. Many bosses are required for achievements and 100% completion - see the requirement column for details.

This checklist includes all 47 unique boss encounters organized by ACT. Bosses are categorized as: Required (necessary for story), Required for progression (unlocks paths), Required for 100% Completion (needed for completion), Required for Achievement (unlocks specific achievements), or Optional (fully optional).

Use this checklist alongside the All Achievements Checklist and 100% Completion Checklist to ensure you defeat all necessary bosses for full completion.

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ACT 1 Bosses

✓		Boss Name	Description
		Moss Mother Location: Moss Grotto	In the Ruined Chapel Required
		Bell Beast Location: The Marrow	Stuck in the Bellway silk Required for progression \| Achievement: Liberated
		Lace Location: Deep Docks	Final boss of Deep Docks Required for progression \| Achievement: Pharloom's Welcome
		Fourth Chorus Location: Far Fields	After receiving Drifer's cloak Required \| Achievement: Servant
		Savage Beastfly Location: Hunter's March	Chapel Of The Beast Required for 100% Completion
		Skull Tyrant Location: The Marrow	Grand Hunt: Skull Tyrant Required for 100% Completion
		Skull Tyrant 2 Location: Moss Grotto	Attacks Moss Grotto after unlocking Bonegrave Required
		Moorwing Location: Greymoor	Final boss of Greymoor Required for progression
		Widow Location: Bellhart	Final boss of Bellhart Required \| Achievement: Fanatic
		Moss Mother Duo Location: Weavenest Atla	West path from bench Required for 100% Completion

		Savage Beastfly 2 Location: Far Fields	Grand Hunt: Savage Beastfly Required for 100% Completion
		Great Conchflies Location: Blasted Steps	On the way to Pinstress Required for 100% Completion
		Last Judge Location: Blasted Steps	Final boss of ACT 1 (The Mist path) Required for progression \| Achievement: Judge
		Phantom Location: Exhaust Organ	Final boss of ACT 1 (Blasted Steps path) Required for progression \| Achievement: Grey Ghost
		Sister Splinter Location: Shellwood	Final boss of Shellwood Required

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ACT 2 Bosses

✓		Boss Name	Description
		Cogwork Dancers Location: Cogwork Core	Main boss of Cogwork Core Required
		Trobbio Location: Whispering Vaults	Fight in On The Stage area Required for progression
		Lace Location: The Cradle	Use the elevator in Cogwork Core Required
		Grand Mother Silk Location: The Cradle	Final boss of ACT 2 Required
		First Sinner Location: The Slab	Chained in south-eastern prison Required for 100% Completion
		Disgraced Chef Lugoli Location: Sinner's Road	Final boss of Sinner's Road Required for 100% Completion
		Father Of The Flame Location: Wisp Thicket	Scarecrow boss west from bench Required for 100% Completion

		Groal The Great Location: Bilewater	Final boss of Bilewater in the north Required for 100% Completion
		Forebrothers Signis and Gron Location: Deep Docks	Duo guarding the entrance towards Diving Bell Required for progression
		The Unravelled Location: Whiteward	Behind Surgeon's Key door Required for 100% Completion
		Raging Conchfly Location: Sands Of Karak	Before Coral Tower Required for 100% Completion
		Voltvyrm Location: Sands Of Karak	Voltnest in north Sands Of Karak Required for 100% Completion
		Broodmother Location: The Slab	Grand Hunt: The Wailing Mother Required for 100% Completion
		Second Sentinel Location: Choral Chambers	Wish: Final Audience Required for 100% Completion
		Garmond And Zaza Location: Choral Chambers	Friendly fight on surface east of Choral Chambers Optional

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ACT 3 Bosses

✓		Boss Name	Description
		Bell Eater Location: Choral Chambers	Found in Choral Chambers Required for 100% Completion
		Palestag Location: Verdania	In Lost Verdania Required for 100% Completion

		Clover Dancers Location: Verdania	Final boss of Lost Verdania Required for 100% Completion
		Shrine Guardian Seth Location: Shellwood	Guarding Nyleth Required for 100% Completion
		Nyleth Location: Shellwood	Old Hearts boss in Shellwood Required for 100% Completion
		Skarrsinger Karmelita Location: Far Fields	Old Hearts boss in Far Fields Required for 100% Completion
		Crust King Khann Location: Sands of Karak	Old Hearts boss in Sands of Karak Required for 100% Completion
		Lost Lace Location: The Abyss	Final boss of ACT 3 Required for 100% Completion
		Pinstress Location: Mount Fay	Wish: Fatal Resolve Required for 100% Completion
		Gurr The Outcast Location: Far Fields	Grand Hunt: The Hidden Hunter Required for 100% Completion
		Tormented Trobbio Location: Whispering Vaults	Wish: Pain, Anguish and Misery Optional
		Plasmified Zango Location: Wormways	Alchemist Zylotol's plasmified assistant Optional
		Void Moss Mother Location: Moss Grotto	Void Moss Mother at the bottom Optional
		Lost Garmond Location: Blasted Steps	Infected with void near Bellway Required for Achievement
		Crawfather Location: Greymoor	Accept Crawfather's invitation Optional
		Watcher At The Edge Location: Sands Of Karak	Hidden section in a parkour challenge Optional
		Summoned Saviour Location: Moss Grotto	Steel soul only, in Bonegrave Optional

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