diff --git a/asm/non_matching/delayedEntityLoadManager/DelayedEntityLoadManager_Main.inc b/asm/non_matching/delayedEntityLoadManager/DelayedEntityLoadManager_Main.inc
deleted file mode 100644
index 24da0211..00000000
--- a/asm/non_matching/delayedEntityLoadManager/DelayedEntityLoadManager_Main.inc
+++ /dev/null
@@ -1,184 +0,0 @@
-	.syntax unified
-	push {r4, r5, r6, r7, lr}
-	mov r7, sl
-	mov r6, sb
-	mov r5, r8
-	push {r5, r6, r7}
-	adds r6, r0, #0
-	ldrb r0, [r6, #0xa]
-	bl GetCurrentRoomProperty
-	adds r4, r0, #0
-	cmp r4, #0
-	bne _0805AB68
-	bl DeleteThisEntity
-_0805AB68:
-	ldrb r0, [r6, #0xc]
-	movs r1, #0x20
-	adds r1, r1, r6
-	mov r8, r1
-	cmp r0, #0
-	bne _0805ABC8
-	adds r0, #1
-	strb r0, [r6, #0xc]
-	ldr r0, _0805ABF0 @ =gArea
-	ldrb r0, [r0, #8]
-	strb r0, [r1]
-	adds r0, r6, #0
-	movs r1, #6
-	bl SetDefaultPriority
-	ldr r2, _0805ABF4 @ =gNPCData
-	ldrb r0, [r6, #0xb]
-	mov r3, r8
-	ldrb r1, [r3]
-	adds r0, r0, r1
-	lsls r0, r0, #4
-	adds r2, r0, r2
-	movs r5, #0
-	mov sl, r5
-	ldrb r0, [r4]
-	movs r7, #0x21
-	adds r7, r7, r6
-	mov ip, r7
-	cmp r0, #0xff
-	beq _0805ABBE
-_0805ABA4:
-	adds r1, r2, #0
-	adds r0, r4, #0
-	ldm r0!, {r3, r5, r7}
-	stm r1!, {r3, r5, r7}
-	ldr r0, [r0]
-	str r0, [r1]
-	movs r0, #1
-	add sl, r0
-	adds r4, #0x10
-	adds r2, #0x10
-	ldrb r0, [r4]
-	cmp r0, #0xff
-	bne _0805ABA4
-_0805ABBE:
-	movs r0, #0xff
-	strb r0, [r2]
-	mov r2, sl
-	mov r1, ip
-	strb r2, [r1]
-_0805ABC8:
-	ldr r4, _0805ABF4 @ =gNPCData
-	ldrb r2, [r6, #0xb]
-	mov r3, r8
-	ldrb r1, [r3]
-	adds r0, r2, r1
-	lsls r0, r0, #4
-	adds r4, r0, r4
-	ldr r0, _0805ABF8 @ =gSave
-	movs r5, #1
-	mov sl, r5
-	mov r7, sl
-	ldrb r0, [r0, #8]
-	lsls r7, r0
-	mov sl, r7
-	adds r0, r1, #7
-	asrs r0, r0, #3
-	ldr r1, _0805ABFC @ =gUnk_020342F8
-	adds r7, r0, r1
-	adds r5, r2, #0
-	b _0805ACAA
-	.align 2, 0
-_0805ABF0: .4byte gArea
-_0805ABF4: .4byte gNPCData
-_0805ABF8: .4byte gSave
-_0805ABFC: .4byte gUnk_020342F8
-_0805AC00:
-	ldrh r0, [r4, #4]
-	ldrh r1, [r4, #6]
-	movs r2, #0x18
-	movs r3, #0x20
-	bl CheckRectOnScreen
-	cmp r0, #0
-	bne _0805AC1A
-	adds r0, r7, #0
-	adds r1, r5, #0
-	bl ClearBit
-	b _0805ACA6
-_0805AC1A:
-	ldrh r0, [r4, #0xe]
-	mov r1, sl
-	ands r0, r1
-	cmp r0, #0
-	beq _0805ACA6
-	ldr r0, _0805AC5C @ =gEntCount
-	ldrb r0, [r0]
-	cmp r0, #0x46
-	bhi _0805ACA6
-	adds r0, r7, #0
-	adds r1, r5, #0
-	bl WriteBit
-	cmp r0, #0
-	bne _0805ACA6
-	ldr r0, [r4, #8]
-	cmp r0, #0
-	beq _0805AC48
-	bl CreateScriptExecutionContext
-	mov sb, r0
-	cmp r0, #0
-	beq _0805ACA6
-_0805AC48:
-	ldrb r0, [r6, #0xe]
-	cmp r0, #0
-	bne _0805AC60
-	ldrb r0, [r4]
-	ldrb r1, [r4, #1]
-	ldrb r2, [r4, #2]
-	bl CreateNPC
-	b _0805AC6A
-	.align 2, 0
-_0805AC5C: .4byte gEntCount
-_0805AC60:
-	ldrb r0, [r4]
-	ldrb r1, [r4, #1]
-	ldrb r2, [r4, #2]
-	bl CreateObject
-_0805AC6A:
-	adds r3, r0, #0
-	mov r2, r8
-	ldrb r0, [r2]
-	adds r0, #1
-	adds r0, r5, r0
-	adds r1, r3, #0
-	adds r1, #0x45
-	strb r0, [r1]
-	ldrh r0, [r4, #0xc]
-	strb r0, [r3, #0xe]
-	ldr r1, _0805ACBC @ =gRoomControls
-	ldrh r0, [r1, #6]
-	ldrh r2, [r4, #4]
-	adds r0, r0, r2
-	strh r0, [r3, #0x2e]
-	ldrh r0, [r1, #8]
-	ldrh r1, [r4, #6]
-	adds r0, r0, r1
-	strh r0, [r3, #0x32]
-	ldrb r1, [r4, #3]
-	adds r0, r3, #0
-	adds r0, #0x38
-	strb r1, [r0]
-	ldr r2, [r4, #8]
-	cmp r2, #0
-	beq _0805ACA6
-	adds r0, r3, #0
-	mov r1, sb
-	bl InitScriptForEntity
-_0805ACA6:
-	adds r4, #0x10
-	adds r5, #1
-_0805ACAA:
-	ldrb r0, [r4]
-	cmp r0, #0xff
-	bne _0805AC00
-	pop {r3, r4, r5}
-	mov r8, r3
-	mov sb, r4
-	mov sl, r5
-	pop {r4, r5, r6, r7, pc}
-	.align 2, 0
-_0805ACBC: .4byte gRoomControls
-	.syntax divided
diff --git a/include/asm.h b/include/asm.h
index f14e6f01..7a05b9b7 100644
--- a/include/asm.h
+++ b/include/asm.h
@@ -46,5 +46,6 @@ extern u32 sub_0800445C(struct Entity_*);
 extern u32 sub_080B1AF0(struct Entity_*, s32, s32);
 extern u32 GetRelativeCollisionTile(struct Entity_*, u32, u32);
 extern bool32 sub_080B1B54(u32);
+extern u32 CheckRectOnScreen(s32, s32, u32, u32);
 
 #endif // ASM_H
diff --git a/include/npc.h b/include/npc.h
index 05ee9e36..6f719154 100644
--- a/include/npc.h
+++ b/include/npc.h
@@ -51,6 +51,19 @@ typedef struct {
     } data;
 } Dialog;
 
+typedef struct {
+    /*0x00*/ u8 id;
+    /*0x01*/ u8 type;
+    /*0x02*/ u8 type2;
+    /*0x03*/ u8 collisionLayer;
+    /*0x04*/ u16 x;
+    /*0x06*/ u16 y;
+    /*0x08*/ u16* script;
+    /*0x0c*/ u16 timer;
+    /*0x0e*/ u16 progressBitfield; /**< For which gSave.global_process this NPC should appear. */
+} NPCStruct;
+extern NPCStruct gNPCData[50];
+
 void sub_0806EC20(Entity* ent);
 void sub_0806EC38(void);
 u32 sub_0806ED78(Entity* ent);
diff --git a/include/script.h b/include/script.h
index 4591ac27..0c1c4ed5 100644
--- a/include/script.h
+++ b/include/script.h
@@ -29,6 +29,8 @@ typedef struct {
 } ActiveScriptInfo;
 extern ActiveScriptInfo gActiveScriptInfo;
 
+ScriptExecutionContext* CreateScriptExecutionContext(void);
+void InitScriptForEntity(Entity*, ScriptExecutionContext*, u16*);
 void ExecuteScript(Entity* entity, ScriptExecutionContext* context);
 
 extern u32 GetNextScriptCommandHalfword(u16*);
diff --git a/src/manager/delayedEntityLoadManager.c b/src/manager/delayedEntityLoadManager.c
index a878d70e..f113330a 100644
--- a/src/manager/delayedEntityLoadManager.c
+++ b/src/manager/delayedEntityLoadManager.c
@@ -6,9 +6,79 @@
  */
 #include "manager/delayedEntityLoadManager.h"
 #include "room.h"
+#include "npc.h"
+#include "area.h"
+#include "asm.h"
 
-ASM_FUNC("asm/non_matching/delayedEntityLoadManager/DelayedEntityLoadManager_Main.inc",
-         void DelayedEntityLoadManager_Main())
+typedef struct {
+    Manager base;
+    u8 unk_20;
+    u8 spawnedCount; /**< Count of entities spawned by this manager */
+} DelayedEntityLoadManager;
+
+extern u8 gUnk_020342F8[];
+
+void DelayedEntityLoadManager_Main(DelayedEntityLoadManager* this) {
+    NPCStruct* properties;
+    NPCStruct* npcPtr;
+    NPCStruct* npcPtr2;
+    Entity* entity;
+    u32 index1;
+    u32 index2;
+    u32 tmp;
+    u32 progressMask;
+    u8* bitfield;
+    ScriptExecutionContext* context;
+
+    properties = GetCurrentRoomProperty(super->type);
+    if (properties == NULL) {
+        DeleteThisEntity();
+    }
+    if (super->action == 0) {
+        super->action++;
+        this->unk_20 = gArea.filler[2];
+        SetDefaultPriority((Entity*)this, 6);
+        npcPtr = gNPCData;
+        npcPtr += (super->type2 + this->unk_20);
+        index1 = 0;
+        while (properties->id != 0xff) {
+            *npcPtr = *properties;
+            index1++;
+            properties++;
+            npcPtr++;
+        }
+        npcPtr->id = 0xff;
+        this->spawnedCount = index1;
+    }
+    npcPtr2 = gNPCData;
+    npcPtr2 = &npcPtr2[(super->type2 + this->unk_20)];
+    progressMask = 1 << gSave.global_progress;
+    bitfield = &gUnk_020342F8[(this->unk_20 + 7) / 8];
+    index2 = super->type2;
+    while (npcPtr2->id != 0xff) {
+        if (!CheckRectOnScreen(npcPtr2->x, npcPtr2->y, 0x18, 0x20)) {
+            ClearBit(bitfield, index2);
+        } else if ((npcPtr2->progressBitfield & progressMask) && gEntCount < 0x47 && !WriteBit(bitfield, index2) &&
+                   (npcPtr2->script == NULL || (context = CreateScriptExecutionContext(), context != NULL))) {
+            if (super->timer == 0) {
+                entity = CreateNPC(npcPtr2->id, npcPtr2->type, npcPtr2->type2);
+            } else {
+                entity = CreateObject(npcPtr2->id, npcPtr2->type, npcPtr2->type2);
+            }
+            tmp = this->unk_20 + 1;
+            entity->health = index2 + tmp;
+            entity->timer = npcPtr2->timer;
+            entity->x.HALF.HI = npcPtr2->x + gRoomControls.origin_x;
+            entity->y.HALF.HI = npcPtr2->y + gRoomControls.origin_y;
+            entity->collisionLayer = npcPtr2->collisionLayer;
+            if (npcPtr2->script != NULL) {
+                InitScriptForEntity(entity, context, npcPtr2->script);
+            }
+        }
+        npcPtr2++;
+        index2++;
+    }
+}
 
 u32 sub_0805ACC0(Entity* param_1) {
     u16* ptr;
diff --git a/src/manager/houseSignManager.c b/src/manager/houseSignManager.c
index 6478310e..8722de83 100644
--- a/src/manager/houseSignManager.c
+++ b/src/manager/houseSignManager.c
@@ -11,6 +11,7 @@
 #include "area.h"
 #include "object.h"
 #include "room.h"
+#include "asm.h"
 
 typedef struct {
     u16 x;
@@ -21,8 +22,6 @@ typedef struct {
     u8 _padding;
 } SpawnData;
 
-extern u32 CheckRectOnScreen(u16, u16, u32, u32);
-
 void HouseSignManager_Main(HouseSignManager* this) {
     static const SpawnData gUnk_081084C8[] = {
         { 0x48, 0x90, 0x0, 0x0, 0x2, 0x0 },   { 0x138, 0x30, 0x1, 0x1, 0x2, 0x0 },
diff --git a/src/manager/lightManager.c b/src/manager/lightManager.c
index 9aa3df2c..edad0b7d 100644
--- a/src/manager/lightManager.c
+++ b/src/manager/lightManager.c
@@ -14,10 +14,10 @@
 #include "player.h"
 #include "room.h"
 #include "screen.h"
+#include "asm.h"
 
 extern void sub_0801E120(void);
 extern void sub_0801E154(u32);
-extern u32 CheckRectOnScreen(s32, s32, u32, u32);
 extern void sub_0801E160(u32, u32, u32);
 
 bool32 sub_0805BA78();
diff --git a/src/manager/minishSizedEntranceManager.c b/src/manager/minishSizedEntranceManager.c
index de5a1969..3cac2f1f 100644
--- a/src/manager/minishSizedEntranceManager.c
+++ b/src/manager/minishSizedEntranceManager.c
@@ -9,8 +9,7 @@
 #include "functions.h"
 #include "object.h"
 #include "room.h"
-
-extern bool32 CheckRectOnScreen(u16, u16, u32, u32);
+#include "asm.h"
 
 typedef struct {
     u16 x;
diff --git a/src/npc.c b/src/npc.c
index 244749f0..99c07fee 100644
--- a/src/npc.c
+++ b/src/npc.c
@@ -4,13 +4,6 @@
 #include "npc.h"
 
 extern u32 gUnk_020342F8;
-typedef struct {
-    u16 unk0;
-    u16 unk1;
-    u16 x;
-    u16 y;
-} NPCStruct;
-extern NPCStruct gNPCData[100];
 
 extern void InitNPC(Entity*);
 
@@ -29,7 +22,7 @@ void NPCUpdate(Entity* this) {
 
         if (this->health % 0x80) {
             NPCStruct* npc = gNPCData;
-            npc += (this->health * 2 - 2);
+            npc += (this->health - 1);
             npc->x = this->x.HALF.HI - gRoomControls.origin_x;
             npc->y = this->y.HALF.HI - gRoomControls.origin_y;
         }
diff --git a/src/object/houseSign.c b/src/object/houseSign.c
index 7e5413b0..b8972164 100644
--- a/src/object/houseSign.c
+++ b/src/object/houseSign.c
@@ -5,8 +5,7 @@
  * @brief HouseSign object
  */
 #include "entity.h"
-
-extern u32 CheckRectOnScreen(s16, s16, u32, u32);
+#include "asm.h"
 
 /*
 This object is created by HouseSignManager.
@@ -17,7 +16,7 @@ void HouseSign(Entity* this) {
     if (this->action == 0) {
         this->action = 1;
     }
-    if (CheckRectOnScreen(this->field_0x80.HWORD, this->field_0x82.HWORD, 0x10, 0x10) == 0) {
+    if (CheckRectOnScreen((s16)this->field_0x80.HWORD, (s16)this->field_0x82.HWORD, 0x10, 0x10) == 0) {
         this->parent->zVelocity &= ~(1 << this->type2);
         DeleteThisEntity();
     }
diff --git a/src/script.c b/src/script.c
index ed3d67e4..a8725c7d 100644
--- a/src/script.c
+++ b/src/script.c
@@ -10,7 +10,6 @@
 #include "item.h"
 #include "ui.h"
 
-void InitScriptForEntity(Entity*, ScriptExecutionContext*, u16*);
 void InitScriptExecutionContext(ScriptExecutionContext* context, u16* script);
 void sub_0807DE80(Entity*);
 void DisablePauseMenu(void);