diff --git a/include/functions.h b/include/functions.h
index 239bb91c67..37e0afd477 100644
--- a/include/functions.h
+++ b/include/functions.h
@@ -2737,7 +2737,7 @@ u8 func_8013DB90(GlobalContext* globalCtx, UNK_PTR arg1, f32 arg2);
 // void func_8013E07C(void);
 // void func_8013E0A4(void);
 void func_8013E1C8(s32 iParm1, s32 iParm2, s32 iParm3, s32* piParm4);
-// void func_8013E2D4(void);
+s32 func_8013E2D4(Actor* actor, s16 arg1, s32 arg2, s32 arg3);
 // void func_8013E3B8(void);
 // void func_8013E4B0(void);
 // void func_8013E5CC(UNK_TYPE1 param_1, UNK_TYPE1 param_2, UNK_TYPE1 param_3, UNK_TYPE1 param_4, UNK_TYPE4 param_5, UNK_TYPE4 param_6);
diff --git a/linker_scripts/code_script.txt b/linker_scripts/code_script.txt
index b9131b2aea..942a97fd5d 100644
--- a/linker_scripts/code_script.txt
+++ b/linker_scripts/code_script.txt
@@ -8175,9 +8175,9 @@ SECTIONS
     ovl_Bg_Haka_Tomb : AT(RomLocation)
     {
         build/src/overlays/actors/ovl_Bg_Haka_Tomb/z_bg_haka_tomb.o(.text)
-        build/asm/overlays/ovl_Bg_Haka_Tomb_data.o(.data)
+        build/src/overlays/actors/ovl_Bg_Haka_Tomb/z_bg_haka_tomb.o(.data)
         build/src/overlays/actors/ovl_Bg_Haka_Tomb/z_bg_haka_tomb.o(.rodata)
-        build/asm/overlays/ovl_Bg_Haka_Tomb_rodata.o(.rodata)
+        build/src/overlays/actors/ovl_Bg_Haka_Tomb/z_bg_haka_tomb_overlay.o(.ovl)
     }
     SegmentEnd = .;
     SegmentSize = SegmentEnd - SegmentStart;
diff --git a/linker_scripts/object_script.txt b/linker_scripts/object_script.txt
index 422228ba3e..84ee431056 100644
--- a/linker_scripts/object_script.txt
+++ b/linker_scripts/object_script.txt
@@ -181,6 +181,10 @@ D_0600DF98 = 0x0600DF98;
 D_0600F990 = 0x0600F990;
 D_0600F048 = 0x0600F048;
 
+/* z_bg_haka_tomb */
+D_060007B0 = 0x060007B0;
+D_06000EE8 = 0x06000EE8;
+
 /* z_en_dy_extra */
 D_0600DD40 = 0x0600DD40;
 D_0600DEF0 = 0x0600DEF0;
diff --git a/src/overlays/actors/ovl_Bg_Haka_Tomb/z_bg_haka_tomb.c b/src/overlays/actors/ovl_Bg_Haka_Tomb/z_bg_haka_tomb.c
index 066bbe79df..8880c4b20a 100644
--- a/src/overlays/actors/ovl_Bg_Haka_Tomb/z_bg_haka_tomb.c
+++ b/src/overlays/actors/ovl_Bg_Haka_Tomb/z_bg_haka_tomb.c
@@ -9,7 +9,16 @@ void BgHakaTomb_Destroy(Actor* thisx, GlobalContext* globalCtx);
 void BgHakaTomb_Update(Actor* thisx, GlobalContext* globalCtx);
 void BgHakaTomb_Draw(Actor* thisx, GlobalContext* globalCtx);
 
-/*
+void func_80BD6624(BgHakaTomb* this);
+void func_80BD66AC(BgHakaTomb* this, GlobalContext* globalCtx);
+void func_80BD6754(BgHakaTomb* this);
+void func_80BD6768(BgHakaTomb* this, GlobalContext* globalCtx);
+void BgHakaTomb_SetupDoNothing(BgHakaTomb* this);
+void BgHakaTomb_DoNothing(BgHakaTomb* this, GlobalContext* globalCtx);
+
+extern CollisionHeader D_06000EE8[];
+extern Gfx D_060007B0[];
+
 const ActorInit Bg_Haka_Tomb_InitVars = {
     ACTOR_BG_HAKA_TOMB,
     ACTORCAT_BG,
@@ -21,26 +30,98 @@ const ActorInit Bg_Haka_Tomb_InitVars = {
     (ActorFunc)BgHakaTomb_Update,
     (ActorFunc)BgHakaTomb_Draw,
 };
-*/
 
-#pragma GLOBAL_ASM("./asm/non_matchings/overlays/ovl_Bg_Haka_Tomb_0x80BD6580/BgHakaTomb_Init.asm")
+static InitChainEntry sInitChain[] = {
+    ICHAIN_VEC3F_DIV1000(scale, 100, ICHAIN_STOP),
+};
 
-#pragma GLOBAL_ASM("./asm/non_matchings/overlays/ovl_Bg_Haka_Tomb_0x80BD6580/BgHakaTomb_Destroy.asm")
+static Vec3f D_80BD68A4 = { 30.0f, 90.0f, 0.0f };
 
-#pragma GLOBAL_ASM("./asm/non_matchings/overlays/ovl_Bg_Haka_Tomb_0x80BD6580/func_80BD6624.asm")
+void BgHakaTomb_Init(Actor* thisx, GlobalContext* globalCtx) {
+    BgHakaTomb* this = THIS;
 
-#pragma GLOBAL_ASM("./asm/non_matchings/overlays/ovl_Bg_Haka_Tomb_0x80BD6580/func_80BD6638.asm")
+    Actor_ProcessInitChain(&this->dyna.actor, sInitChain);
+    BcCheck3_BgActorInit(&this->dyna, 1);
+    BgCheck3_LoadMesh(globalCtx, &this->dyna, D_06000EE8);
+    func_8013E3B8(&this->dyna.actor, &this->unk160, 1);
+    func_80BD6624(this);
+}
 
-#pragma GLOBAL_ASM("./asm/non_matchings/overlays/ovl_Bg_Haka_Tomb_0x80BD6580/func_80BD66AC.asm")
+void BgHakaTomb_Destroy(Actor* thisx, GlobalContext* globalCtx) {
+    BgHakaTomb* this = THIS;
 
-#pragma GLOBAL_ASM("./asm/non_matchings/overlays/ovl_Bg_Haka_Tomb_0x80BD6580/func_80BD6754.asm")
+    BgCheck_RemoveActorMesh(globalCtx, &globalCtx->colCtx.dyna, this->dyna.bgId);
+}
 
-#pragma GLOBAL_ASM("./asm/non_matchings/overlays/ovl_Bg_Haka_Tomb_0x80BD6580/func_80BD6768.asm")
+void func_80BD6624(BgHakaTomb* this) {
+    this->actionFunc = func_80BD66AC;
+}
 
-#pragma GLOBAL_ASM("./asm/non_matchings/overlays/ovl_Bg_Haka_Tomb_0x80BD6580/func_80BD67A8.asm")
+s32 func_80BD6638(s16* arg0, s16* arg1, s32 arg2) {
+    s32 pad;
+    s32 retVal = false;
+    s32 i;
 
-#pragma GLOBAL_ASM("./asm/non_matchings/overlays/ovl_Bg_Haka_Tomb_0x80BD6580/func_80BD67BC.asm")
+    *arg0 = ActorCutscene_GetCurrentIndex();
+    if (*arg0 >= 0) {
+        for (i = 0; i < arg2; i++) {
+            if (*arg0 == arg1[i]) {
+                retVal = true;
+                break;
+            }
+        }
+    }
 
-#pragma GLOBAL_ASM("./asm/non_matchings/overlays/ovl_Bg_Haka_Tomb_0x80BD6580/BgHakaTomb_Update.asm")
+    return retVal;
+}
 
-#pragma GLOBAL_ASM("./asm/non_matchings/overlays/ovl_Bg_Haka_Tomb_0x80BD6580/BgHakaTomb_Draw.asm")
+void func_80BD66AC(BgHakaTomb* this, GlobalContext* globalCtx) {
+    s16 temp;
+
+    if (Actor_GetRoomCleared(globalCtx, this->dyna.actor.room)) {
+        this->dyna.actor.flags |= 9;
+    }
+    if (!func_80BD6638(&temp, this->unk160, 1) && (temp < 0) &&
+        Actor_GetRoomCleared(globalCtx, this->dyna.actor.room)) {
+        this->dyna.actor.flags |= 1;
+        if (this->dyna.actor.isTargeted) {
+            func_80BD6754(this);
+        }
+    } else {
+        this->dyna.actor.flags &= ~1;
+    }
+}
+
+void func_80BD6754(BgHakaTomb* this) {
+    this->actionFunc = func_80BD6768;
+}
+
+void func_80BD6768(BgHakaTomb* this, GlobalContext* globalCtx) {
+    if (func_8013E2D4(&this->dyna.actor, this->unk160[0], -1, 0)) {
+        BgHakaTomb_SetupDoNothing(this);
+    }
+}
+
+void BgHakaTomb_SetupDoNothing(BgHakaTomb* this) {
+    this->actionFunc = BgHakaTomb_DoNothing;
+}
+
+void BgHakaTomb_DoNothing(BgHakaTomb* this, GlobalContext* globalCtx) {
+}
+
+void BgHakaTomb_Update(Actor* thisx, GlobalContext* globalCtx) {
+    BgHakaTomb* this = THIS;
+    s32 pad;
+    Vec3f vec;
+
+    this->actionFunc(this, globalCtx);
+    Matrix_RotateY(this->dyna.actor.world.rot.y, MTXMODE_NEW);
+    SysMatrix_InsertXRotation_s(this->dyna.actor.world.rot.x, MTXMODE_APPLY);
+    SysMatrix_InsertZRotation_s(this->dyna.actor.world.rot.z, MTXMODE_APPLY);
+    SysMatrix_MultiplyVector3fByState(&D_80BD68A4, &vec);
+    Math_Vec3f_Sum(&this->dyna.actor.world.pos, &vec, &this->dyna.actor.focus.pos);
+}
+
+void BgHakaTomb_Draw(Actor* thisx, GlobalContext* globalCtx) {
+    func_800BDFC0(globalCtx, D_060007B0);
+}
diff --git a/src/overlays/actors/ovl_Bg_Haka_Tomb/z_bg_haka_tomb.h b/src/overlays/actors/ovl_Bg_Haka_Tomb/z_bg_haka_tomb.h
index 47999c9be5..07c4bb44c5 100644
--- a/src/overlays/actors/ovl_Bg_Haka_Tomb/z_bg_haka_tomb.h
+++ b/src/overlays/actors/ovl_Bg_Haka_Tomb/z_bg_haka_tomb.h
@@ -5,9 +5,12 @@
 
 struct BgHakaTomb;
 
+typedef void (*BgHakaTombActionFunc)(struct BgHakaTomb*, GlobalContext*);
+
 typedef struct BgHakaTomb {
-    /* 0x000 */ Actor actor;
-    /* 0x144 */ char unk_144[0x20];
+    /* 0x000 */ DynaPolyActor dyna;
+    /* 0x15C */ BgHakaTombActionFunc actionFunc;
+    /* 0x160 */ s16 unk160[2];
 } BgHakaTomb; // size = 0x164
 
 extern const ActorInit Bg_Haka_Tomb_InitVars;
diff --git a/tables/functions.txt b/tables/functions.txt
index 36d09164f4..a28a826ed6 100644
--- a/tables/functions.txt
+++ b/tables/functions.txt
@@ -15856,8 +15856,8 @@
     0x80BD66AC:("func_80BD66AC",),
     0x80BD6754:("func_80BD6754",),
     0x80BD6768:("func_80BD6768",),
-    0x80BD67A8:("func_80BD67A8",),
-    0x80BD67BC:("func_80BD67BC",),
+    0x80BD67A8:("BgHakaTomb_SetupDoNothing",),
+    0x80BD67BC:("BgHakaTomb_DoNothing",),
     0x80BD67CC:("BgHakaTomb_Update",),
     0x80BD6844:("BgHakaTomb_Draw",),
     0x80BD6910:("func_80BD6910",),