diff --git a/spec b/spec
index 338c82a3cc..a0db205d93 100644
--- a/spec
+++ b/spec
@@ -4504,8 +4504,7 @@ beginseg
     name "ovl_Obj_Yasi"
     compress
     include "build/src/overlays/actors/ovl_Obj_Yasi/z_obj_yasi.o"
-    include "build/data/ovl_Obj_Yasi/ovl_Obj_Yasi.data.o"
-    include "build/data/ovl_Obj_Yasi/ovl_Obj_Yasi.reloc.o"
+    include "build/src/overlays/actors/ovl_Obj_Yasi/ovl_Obj_Yasi_reloc.o"
 endseg
 
 beginseg
diff --git a/src/overlays/actors/ovl_Obj_Yasi/z_obj_yasi.c b/src/overlays/actors/ovl_Obj_Yasi/z_obj_yasi.c
index 5668371fbe..3ed7879184 100644
--- a/src/overlays/actors/ovl_Obj_Yasi/z_obj_yasi.c
+++ b/src/overlays/actors/ovl_Obj_Yasi/z_obj_yasi.c
@@ -5,17 +5,19 @@
  */
 
 #include "z_obj_yasi.h"
+#include "objects/object_obj_yasi/object_obj_yasi.h"
 
 #define FLAGS 0x00000000
 
 #define THIS ((ObjYasi*)thisx)
 
+#define CAN_DROP_NUT(thisx) (thisx->params < 0)
+
 void ObjYasi_Init(Actor* thisx, GlobalContext* globalCtx);
 void ObjYasi_Destroy(Actor* thisx, GlobalContext* globalCtx);
 void ObjYasi_Update(Actor* thisx, GlobalContext* globalCtx);
 void ObjYasi_Draw(Actor* thisx, GlobalContext* globalCtx);
 
-#if 0
 const ActorInit Obj_Yasi_InitVars = {
     ACTOR_OBJ_YASI,
     ACTORCAT_PROP,
@@ -28,25 +30,72 @@ const ActorInit Obj_Yasi_InitVars = {
     (ActorFunc)ObjYasi_Draw,
 };
 
-// static InitChainEntry sInitChain[] = {
-static InitChainEntry D_80BB4D90[] = {
+static InitChainEntry sInitChain[] = {
     ICHAIN_VEC3F_DIV1000(scale, 100, ICHAIN_CONTINUE),
     ICHAIN_F32(uncullZoneForward, 4000, ICHAIN_CONTINUE),
     ICHAIN_F32(uncullZoneScale, 400, ICHAIN_CONTINUE),
     ICHAIN_F32(uncullZoneDownward, 800, ICHAIN_STOP),
 };
 
-#endif
+void ObjYasi_Init(Actor* thisx, GlobalContext* globalCtx) {
+    ObjYasi* this = THIS;
 
-extern InitChainEntry D_80BB4D90[];
+    Actor_ProcessInitChain(&this->dyna.actor, sInitChain);
+    DynaPolyActor_Init(&this->dyna, 0);
+    DynaPolyActor_LoadMesh(globalCtx, &this->dyna, &object_obj_yasi_Colheader_001428);
 
-extern UNK_TYPE D_06000360;
-extern UNK_TYPE D_06001428;
+    this->dyna.actor.home.rot.y = 0;
 
-#pragma GLOBAL_ASM("asm/non_matchings/overlays/ovl_Obj_Yasi/ObjYasi_Init.s")
+    if (OBJYASI_IS_WIDE(thisx)) {
+        this->dyna.actor.scale.x = 0.2f;
+        this->dyna.actor.scale.z = 0.2f;
+    }
+}
 
-#pragma GLOBAL_ASM("asm/non_matchings/overlays/ovl_Obj_Yasi/ObjYasi_Destroy.s")
+void ObjYasi_Destroy(Actor* thisx, GlobalContext* globalCtx) {
+    ObjYasi* this = THIS;
 
-#pragma GLOBAL_ASM("asm/non_matchings/overlays/ovl_Obj_Yasi/ObjYasi_Update.s")
+    DynaPoly_DeleteBgActor(globalCtx, &globalCtx->colCtx.dyna, this->dyna.bgId);
+}
 
-#pragma GLOBAL_ASM("asm/non_matchings/overlays/ovl_Obj_Yasi/ObjYasi_Draw.s")
+void ObjYasi_Update(Actor* thisx, GlobalContext* globalCtx) {
+    ObjYasi* this = THIS;
+    s16 temp;
+    Vec3f dropPos;
+
+    if (this->dyna.actor.home.rot.z != 0) {
+        if (CAN_DROP_NUT(thisx)) {
+            if (Rand_ZeroOne() < 0.5f) {
+                dropPos.x = this->dyna.actor.world.pos.x;
+                dropPos.y = this->dyna.actor.world.pos.y + 280.0f;
+                dropPos.z = this->dyna.actor.world.pos.z;
+                Item_DropCollectible(globalCtx, &dropPos, ITEM00_NUTS_1);
+            }
+        }
+        this->dyna.actor.home.rot.y = GET_PLAYER(globalCtx)->actor.shape.rot.y;
+        this->dyna.actor.home.rot.x = 400;
+        this->dyna.actor.home.rot.z = 0;
+    }
+    temp = (s16)(this->dyna.actor.shape.rot.x * 0.1f);
+    this->dyna.actor.home.rot.x -= temp;
+    this->dyna.actor.shape.rot.x +=
+        BINANG_SUB(this->dyna.actor.home.rot.x, (s16)(this->dyna.actor.shape.rot.x * 0.08f));
+}
+
+void ObjYasi_Draw(Actor* thisx, GlobalContext* globalCtx) {
+    ObjYasi* this = THIS;
+
+    Matrix_InsertTranslation(this->dyna.actor.world.pos.x, this->dyna.actor.world.pos.y, this->dyna.actor.world.pos.z,
+                             MTXMODE_NEW);
+
+    if (this->dyna.actor.shape.rot.x != 0) {
+        Matrix_RotateY(this->dyna.actor.home.rot.y, MTXMODE_APPLY);
+        Matrix_InsertXRotation_s(this->dyna.actor.shape.rot.x, MTXMODE_APPLY);
+        Matrix_RotateY(BINANG_SUB(this->dyna.actor.shape.rot.y, this->dyna.actor.home.rot.y), MTXMODE_APPLY);
+    } else {
+        Matrix_RotateY(this->dyna.actor.shape.rot.y, MTXMODE_APPLY);
+    }
+
+    Matrix_Scale(0.1f, 0.1f, 0.1f, MTXMODE_APPLY);
+    Gfx_DrawDListOpa(globalCtx, object_obj_yasi_DL_000360);
+}
diff --git a/src/overlays/actors/ovl_Obj_Yasi/z_obj_yasi.h b/src/overlays/actors/ovl_Obj_Yasi/z_obj_yasi.h
index 3671a776cd..f4ab9ca9ca 100644
--- a/src/overlays/actors/ovl_Obj_Yasi/z_obj_yasi.h
+++ b/src/overlays/actors/ovl_Obj_Yasi/z_obj_yasi.h
@@ -6,10 +6,11 @@
 struct ObjYasi;
 
 typedef struct ObjYasi {
-    /* 0x000 */ Actor actor;
-    /* 0x144 */ char unk_144[0x18];
+    /* 0x000 */ DynaPolyActor dyna;
 } ObjYasi; // size = 0x15C
 
 extern const ActorInit Obj_Yasi_InitVars;
 
+#define OBJYASI_IS_WIDE(thisx) ((thisx)->params & 1)
+
 #endif // Z_OBJ_YASI_H
diff --git a/undefined_syms.txt b/undefined_syms.txt
index ba44de7b0d..6545df94c7 100644
--- a/undefined_syms.txt
+++ b/undefined_syms.txt
@@ -1965,11 +1965,6 @@ D_06000F80 = 0x06000F80;
 D_06001680 = 0x06001680;
 D_060019B0 = 0x060019B0;
 
-// ovl_Obj_Yasi
-
-D_06000360 = 0x06000360;
-D_06001428 = 0x06001428;
-
 // ovl_player_actor
 
 D_06008860 = 0x06008860;