diff --git a/LTTP_RND_GeneralBugfixes.asm b/LTTP_RND_GeneralBugfixes.asm
index 89d7027..fa635bf 100644
--- a/LTTP_RND_GeneralBugfixes.asm
+++ b/LTTP_RND_GeneralBugfixes.asm
@@ -223,6 +223,7 @@ incsrc msu.asm
 incsrc multiworld.asm
 incsrc terrorpin.asm
 incsrc special_bombs.asm
+incsrc variable_ganon_vulnerability.asm
 warnpc $A58000
 
 ;org $228000 ; contrib area
diff --git a/dialog.asm b/dialog.asm
index fda6ef6..32aebdc 100644
--- a/dialog.asm
+++ b/dialog.asm
@@ -303,28 +303,57 @@ DialogGanon2:
 
 	REP #$20
 	BCS +
-		LDA.w #$018D : BRA ++
+		LDA.w #$018D : JMP .done
 	+
+		LDA.l GanonVulnerabilityItem : AND #$00FF : BNE .special_item
 		LDA.l SpecialBombs
-		AND.w #$00FF : BEQ + ; branch if not special bomb mode
-		LDA.w #$0195 : BRA ++
-	+
+		AND.w #$00FF : BNE .bombs ; bombs if special bomb mode
+	.silver_arrows
 		LDA.l $7EF38E
 
 		BIT.w #$0080 : BNE + ; branch if bow
-		LDA.w #$0192 : BRA ++
+		LDA.w #$0192 : JMP .done
 	+
 		BIT.w #$0040 : BEQ + ; branch if no silvers
-		LDA.w #$0195 : BRA ++
+		LDA.w #$0195 : JMP .done
 	+
 		BIT.w #$0020 : BNE + ; branch if p bow
-		LDA.w #$0194 : BRA ++
+		LDA.w #$0194 : JMP .done
 	+
 		BIT.w #$0080 : BEQ + ; branch if no bow
-		LDA.w #$0193 : BRA ++
+		LDA.w #$0193 : JMP .done
 	+
-		LDA.w #$016E
-	++
+		LDA.w #$016E : JMP .done
+	.special_item
+		CMP.w #$0001 : BEQ .silver_arrows
+		CMP.w #$0004 : BEQ .bombs
+		CMP.w #$0005 : BEQ .powder
+		CMP.w #$0010 : BEQ .bee
+		PHX : TAX
+		LDA.l $7EF33F, X : PLX : AND #$00FF : BNE +
+		LDA.w #$0192 : JMP .done
+	+
+		LDA.w #$0195 : BRA .done
+	.bombs
+		LDA.l $7EF343 : AND #$00FF : BNE +
+		LDA.l $7F50C9 : AND #$00FF : BNE + ; check for infinite bombs
+		LDA.w #$0192 : BRA .done
+	+
+		LDA.w #$0195 : BRA .done
+	.powder
+		LDA.l $7EF38C : AND #$0010 : BNE +
+		LDA.w #$0192 : BRA .done
+	+
+		LDA.w #$0195 : BRA .done
+	.bee
+		LDA.l $7EF35C : AND #$00FF : CMP.w #$0007 : BEQ + : CMP.w #$0008 : BEQ +
+		LDA.l $7EF35D : AND #$00FF : CMP.w #$0007 : BEQ + : CMP.w #$0008 : BEQ +
+		LDA.l $7EF35E : AND #$00FF : CMP.w #$0007 : BEQ + : CMP.w #$0008 : BEQ +
+		LDA.l $7EF35F : AND #$00FF : CMP.w #$0007 : BEQ + : CMP.w #$0008 : BEQ +
+		LDA.w #$0192 : BRA .done
+	+
+		LDA.w #$0195 : BRA .done
+	.done
 	STA $1CF0
 	SEP #$20
 	JSL.l Sprite_ShowMessageMinimal_Alt
diff --git a/hooks.asm b/hooks.asm
index 61ae221..65f632c 100755
--- a/hooks.asm
+++ b/hooks.asm
@@ -2760,3 +2760,23 @@ db $B2, $2C, $B3, $2C, $C2, $2C, $18, $2C
 db $B2, $24, $B3, $24, $C2, $24, $19, $24
 db $B2, $28, $B3, $28, $C2, $28, $1A, $28
 db $B2, $28, $B3, $28, $C2, $28, $1B, $28
+;--------------------------------------------------------------------------------
+
+;================================================================================
+; Variable Ganon Vulnerability
+;--------------------------------------------------------------------------------
+org $08BBD4 ; ancilla_magic_powder.asm@253 (LDA #$0A : JSL Ancilla_CheckSpriteDamage.preset_class)
+JSL Ganon_CheckPowderVulnerability
+NOP #2
+;--------------------------------------------------------------------------------
+org $1D8F4E ; sprite_ganon.asm@325 (LDA $04C5 : CMP #$02)
+JSL Ganon_CheckInvincible
+NOP
+;--------------------------------------------------------------------------------
+org $0DD628 ; Bank0D.asm@1266 (LDA $0B6B, Y : AND #$02)
+JSL CheckBeeBoss
+NOP
+;--------------------------------------------------------------------------------
+org $0DD677 ; Bank0D.asm@1303 (JSL Ancilla_CheckSpriteDamage.preset_class)
+JSL Ganon_CheckBeeVulnerability
+;--------------------------------------------------------------------------------
diff --git a/special_bombs.asm b/special_bombs.asm
index e39837c..f3ac872 100644
--- a/special_bombs.asm
+++ b/special_bombs.asm
@@ -1,9 +1,17 @@
 ;--------------------------------------------------------------------------------
 !ANCILLA_DAMAGE = "$06EC84"
 !BOMB_LEVEL = "$7EF4A8"
-; start with X = sprite index, A = ancilla index
+; start with X = sprite index, A = ancilla type index
 ;--------------------------------------------------------------------------------
 DamageClassCalc:
+	PHA
+	LDA GanonVulnerabilityItem : BEQ +
+	LDA $0E20, X : CMP #$D7 : BNE +
+	PLA
+	JSL Ganon_CheckAncillaVulnerability
+	RTL
++
+	PLA
 	CMP #$01 : BEQ .cane
 	CMP #$2C : BEQ .cane
 	CMP #$31 : BEQ .cane
@@ -58,11 +66,13 @@ DamageClassCalc:
 	PLX
 	CMP.b #$06 : BNE .done ; not arrows
 	LDA $7EF340 : CMP.b #$03 : !BGE .actual_silver_arrows
+.normal_arrows
 	LDA #$06
 .done
 	RTL
 .actual_silver_arrows
 	LDA $0E20, X : CMP.b #$D7 : BNE +
+	LDA SpecialBombs : BNE .normal_arrows
 	LDA #$20 : STA $0F10, X
 	+
 	LDA #$09
@@ -195,6 +205,7 @@ Utility_CheckImpervious:
 	LDA $0CF2 : CMP #$FF : BEQ .impervious ; special "always-impervious" class
 	LDA $0E20, X : CMP.b #$CC : BEQ .sidenexx : CMP.b #$CD : BEQ .sidenexx
 	LDA $0301 : AND.b #$0A : BEQ .not_impervious ; normal behavior if not hammer
+	JSL Ganon_CheckHammerVulnerability : BCS .not_impervious
 	LDA.l SpecialBombs : BEQ .not_impervious
 	LDA $0E20, X : CMP.b #$1E : BEQ .not_impervious ; crystal switch
 	CMP.b #$40 : BEQ .not_impervious ; aga barrier
diff --git a/swordswap.asm b/swordswap.asm
index 1cca4d7..213277e 100644
--- a/swordswap.asm
+++ b/swordswap.asm
@@ -149,7 +149,17 @@ CheckGanonHammerDamage:
 	LDA $0E20, X : CMP.b #$D8 ; original behavior except ganon
 RTL
 	+
+	LDA.l GanonVulnerabilityItem : CMP.b #$0C : BEQ +
 	LDA $0E20, X : CMP.b #$D6 ; original behavior
+RTL
+  +
+	LDA $0E20, X : CMP.b #$D8 : BCC +
+RTL
+  +
+  CMP.b #$D6 : BNE +
+RTL
+  +
+  CLC
 RTL
 ;================================================================================
 GetSmithSword:
diff --git a/tables.asm b/tables.asm
index 7551ebb..410b2b2 100644
--- a/tables.asm
+++ b/tables.asm
@@ -98,7 +98,11 @@ db #$02 ; #$02 = Tempered Sword (default)
 ;org $05EBD4 ; PC 0x2EBD4 - sprite_zelda.asm:23 - (LDA $7EF359 : CMP.b #$02 : BCS .hasMasterSword) - Zelda Spawnpoint Sword Check
 ;db #$05 ; #$02 = Tempered Sword (default) - #$05 = All Swords
 ;--------------------------------------------------------------------------------
-; 0x18002B- 0x18002E (Unused)
+; 0x18002B- 0x18002D (Unused)
+;--------------------------------------------------------------------------------
+org $30802E ; PC 0x18003E
+GanonVulnerabilityItem:
+db #$00 ; #$00 = Default behavior (silver arrows)
 ;--------------------------------------------------------------------------------
 org $30802F ; PC 0x18003F
 SpecialBombs:
diff --git a/variable_ganon_vulnerability.asm b/variable_ganon_vulnerability.asm
new file mode 100644
index 0000000..4bf361a
--- /dev/null
+++ b/variable_ganon_vulnerability.asm
@@ -0,0 +1,131 @@
+;--------------------------------------------------------------------------------
+!ANCILLA_DAMAGE = "$06EC84"
+; start with X = sprite index, A = ancilla type index
+;--------------------------------------------------------------------------------
+Ganon_CheckAncillaVulnerability:
+	PHA
+	LDA $0EE0, X : BNE .not_vulnerable_pla
+	PLA
+	PHX : PHA
+	LDA.l GanonVulnerabilityItem
+	TAX : PLA
+	CMP.l Ganon_CheckByAncilla, X : BNE +
+	PLX : BRA .vulnerable
++
+	PLX : PHA
+	LDA.l GanonVulnerabilityItem
+	CMP #$01 : BEQ .silver_arrows
+	CMP #$11 : BEQ .somaria
+	BRA .not_vulnerable_pla
+.silver_arrows
+	PLA : CMP #$09 : BNE .not_vulnerable
+  LDA $7EF340 : CMP.b #$03 : !BGE +
+	LDA #$09 : BRA .not_vulnerable
++
+	BRA .vulnerable
+.hammer
+	BRA .not_vulnerable_pla ; NYI
+.golden_bee
+	BRA .not_vulnerable_pla ; NYI
+.somaria
+	PLA : CMP #$01 : BEQ .vulnerable
+	CMP #$2C : BEQ .vulnerable
+	BRA .vulnerable
+.vulnerable
+	PHX
+	LDA.l GanonVulnerabilityItem
+	TAX
+	LDA.l Ganon_IFrameDuration, X
+	PLX
+	STA $0EE0, X ; give the poor pig some iframes
+	LDA #$20 : STA $0F10, X
+	LDA #$09
+	RTL
+.not_vulnerable_pla
+	PLA
+.not_vulnerable
+	PHX : TAX
+  LDA.l !ANCILLA_DAMAGE, X
+  PLX
+	RTL
+; end with X = sprite index, A = damage class
+;--------------------------------------------------------------------------------
+!ANCILLA_CHECK_SPRITE_DAMAGE_PRESET_CLASS = "$06ECE6"
+;--------------------------------------------------------------------------------
+Ganon_CheckPowderVulnerability: ; we know it's powder
+	LDA.l GanonVulnerabilityItem : CMP #$05 : BNE .normal ; ganon not vulnerable to powder
+	LDA $0E20, X : CMP #$D7 : BNE .normal ; not stunned ganon
+	LDA $0EE0, X : BNE .normal ; ganon has iframes
+	LDA.l Ganon_IFrameDuration+$05
+	STA $0EE0, X ; give the poor pig some iframes
+	LDA #$20 : STA $0F10, X
+	LDA #$09
+	BRA .done
+.normal
+	LDA.b #$0A
+.done
+	JSL.l !ANCILLA_CHECK_SPRITE_DAMAGE_PRESET_CLASS
+	RTL
+;--------------------------------------------------------------------------------
+Ganon_CheckBeeVulnerability: ; we know it's a bee
+	LDA.l GanonVulnerabilityItem : CMP #$10 : BNE .normal ; ganon not vulnerable to bee
+	LDA $0E20, X : CMP #$D7 : BNE .normal ; not stunned ganon
+	LDA $0EE0, X : BNE .normal ; ganon has iframes
+	LDA.l Ganon_IFrameDuration+$10
+	STA $0EE0, X ; give the poor pig some iframes
+	LDA #$20 : STA $0F10, X
+	LDA #$09
+	BRA .done
+.normal
+	LDA.b #$0A
+.done
+	JSL.l !ANCILLA_CHECK_SPRITE_DAMAGE_PRESET_CLASS
+	RTL
+;--------------------------------------------------------------------------------
+Ganon_CheckInvincible:
+	LDA $04C5 : CMP.b #$02 : BEQ .not_transparent
+	LDA $0E20, X : CMP #$D7 : BNE .transparent ; non-stunned ganon
+  LDA $0301 : AND.b #$0A : BEQ .transparent ; normal behavior if not hammer
+	LDA.l GanonVulnerabilityItem : CMP #$0C : BNE .transparent ; ganon not vulnerable to hammer
+.not_transparent
+	LDA #$00 : RTL
+.transparent
+	LDA #$01 : RTL
+; return non-zero A if ganon should be invincible
+;--------------------------------------------------------------------------------
+Ganon_CheckHammerVulnerability: ; we know it's hammer
+	LDA.l GanonVulnerabilityItem : CMP #$0C : BNE .normal ; ganon not vulnerable to hammer
+	LDA $0E20, X : CMP #$D7 : BNE .normal ; not stunned ganon
+	LDA $0EE0, X : BNE .normal ; ganon has iframes
+	LDA.l Ganon_IFrameDuration+$0C
+	STA $0EE0, X ; give the poor pig some iframes
+	LDA #$20 : STA $0F10, X
+	LDA #$09 : STA $0CF2 ; set damage class to silver
+	SEC : RTL
+.normal
+	CLC : RTL
+; return carry set bit if stunned Ganon and Ganon vulnerable to hammer
+;--------------------------------------------------------------------------------
+CheckBeeBoss:
+; Y is sprite index
+	LDA.l GanonVulnerabilityItem : CMP #$10 : BNE .normal ; ganon not vulnerable to bee
+	LDA $0E20, Y : CMP #$D7 : BNE .normal ; not stunned ganon
+	LDA #$00 : RTL
+.normal
+	LDA $0B6B, Y : AND.b #$02
+	RTL
+; return non-zero A if entity is a boss (and bee should not attack)
+;--------------------------------------------------------------------------------
+Ganon_CheckByAncilla:
+db #$00 ; default behavior--we shouldn't be checking the table here anyway
+db #$00, #$05, #$1F, #$07, #$00
+db #$02, #$0B, #$19, #$18, #$1C
+db #$00, #$00, #$00, #$00, #$00
+db #$00, #$00, #$31, #$00, #$00
+Ganon_IFrameDuration:
+db #$00 ; default behavior--we shouldn't be here anyway
+db #$00, #$00, #$00, #$34, #$00
+db #$00, #$00, #$00, #$00, #$00
+db #$00, #$00, #$00, #$00, #$00
+db #$00, #$00, #$00, #$00, #$00
+;--------------------------------------------------------------------------------