diff --git a/include/functions.h b/include/functions.h
index c809471da3..52559cda58 100644
--- a/include/functions.h
+++ b/include/functions.h
@@ -2263,6 +2263,7 @@ void func_800F574C(f32 arg0, UNK_TYPE arg2);
 void func_800F595C(u16);
 void func_800F59E8(u16);
 // ? func_800F5ACC(?);
+void func_800F5B58();
 void func_800F5C64(u16);
 // ? func_800F5CF8(?);
 // ? func_800F5E18(?);
diff --git a/src/overlays/actors/ovl_En_Ik/z_en_ik.c b/src/overlays/actors/ovl_En_Ik/z_en_ik.c
index cee7730dd7..7444e655a2 100644
--- a/src/overlays/actors/ovl_En_Ik/z_en_ik.c
+++ b/src/overlays/actors/ovl_En_Ik/z_en_ik.c
@@ -1,14 +1,41 @@
+/*
+ * File: z_en_ik.c
+ * Overlay: ovl_En_Ik
+ * Description: Iron Knuckle
+ */
+
 #include "z_en_ik.h"
 
+#include <vt.h>
+
 #define FLAGS 0x00000010
 
 #define THIS ((EnIk*)thisx)
 
+typedef void (*EnIkActionFunc)(struct EnIk*, GlobalContext*);
+typedef void (*EnIkDrawFunc)(struct EnIk*, GlobalContext*);
+
 void EnIk_Init(Actor* thisx, GlobalContext* globalCtx);
 void EnIk_Destroy(Actor* thisx, GlobalContext* globalCtx);
 void EnIk_Update(Actor* thisx, GlobalContext* globalCtx);
 void EnIk_Draw(Actor* thisx, GlobalContext* globalCtx);
 
+void func_80A74398(EnIk* this, GlobalContext* globalCtx);
+void func_80A74714(EnIk* this);
+void func_80A75FA0(Actor* thisx, GlobalContext* globalCtx);
+void func_80A76798(Actor* thisx, GlobalContext* globalCtx);
+void func_80A780D0(EnIk* this, GlobalContext* globalCtx);
+
+extern AnimationHeader D_0600C114;
+extern SkeletonHeader D_0601E178;
+
+extern ColliderCylinderInit D_80A78340;
+extern ColliderTrisInit D_80A783E4;
+extern ColliderQuadInit D_80A783F4;
+extern DamageTable D_80A78444;
+extern EnIkActionFunc D_80A78604[5]; // sActionFuncs
+extern EnIkDrawFunc D_80A7861C[2];   // sDrawFuncs
+
 /*
 const ActorInit En_Ik_InitVars = {
     ACTOR_EN_IK,
@@ -22,11 +49,78 @@ const ActorInit En_Ik_InitVars = {
     (ActorFunc)EnIk_Draw,
 };
 */
-#pragma GLOBAL_ASM("asm/non_matchings/overlays/actors/ovl_En_Ik/EnIk_Destroy.s")
+
+void EnIk_Destroy(Actor* thisx, GlobalContext* globalCtx) {
+    EnIk* this = THIS;
+
+    if (Actor_FindNearby(globalCtx, &this->actor, ACTOR_EN_IK, ACTORTYPE_ENEMY, 8000.0f) == NULL) {
+        func_800F5B58();
+    }
+
+    Collider_DestroyTris(globalCtx, &this->unk_3EC);
+    Collider_DestroyCylinder(globalCtx, &this->unk_320);
+    Collider_DestroyQuad(globalCtx, &this->unk_36C);
+}
 
 #pragma GLOBAL_ASM("asm/non_matchings/overlays/actors/ovl_En_Ik/func_80A74390.s")
 
+#ifdef NON_MATCHING
+void func_80A74398(EnIk* this, GlobalContext* globalCtx) {
+    EffectBlureInit1 blureInit;
+
+    this->actor.update = func_80A75FA0;
+    this->actor.draw = func_80A76798;
+    this->actor.flags |= 0x400;
+    Collider_InitCylinder(globalCtx, &this->unk_320);
+    Collider_SetCylinder(globalCtx, &this->unk_320, &this->actor, &D_80A78340);
+    Collider_InitTris(globalCtx, &this->unk_3EC);
+    Collider_SetTris(globalCtx, &this->unk_3EC, &this->actor, &D_80A783E4, this->unk_40C);
+    Collider_InitQuad(globalCtx, &this->unk_36C);
+    Collider_SetQuad(globalCtx, &this->unk_36C, &this->actor, &D_80A783F4);
+    this->actor.colChkInfo.damageTable = &D_80A78444;
+    this->actor.params &= 0xFF;
+    this->actor.colChkInfo.mass = 0xFE;
+    this->unk_2FC = 0;
+    this->actor.colChkInfo.health = 30;
+    this->switchFlags = (this->actor.params >> 8) & 0xFF;
+    this->actor.gravity = -1.0f;
+
+    if (this->actor.params == 0) {
+        this->actor.colChkInfo.health = 50;
+        this->actor.naviEnemyId = 52;
+    } else {
+        Actor_SetScale(&this->actor, 0.012f);
+        this->actor.naviEnemyId = 53;
+        Actor_ChangeType(globalCtx, &globalCtx->actorCtx, &this->actor, ACTORTYPE_ENEMY);
+    }
+
+    blureInit.p1StartColor[0] = blureInit.p1StartColor[1] = blureInit.p2StartColor[0] = blureInit.p2StartColor[1] =
+        blureInit.p2StartColor[2] = blureInit.p1EndColor[0] = blureInit.p1EndColor[1] = blureInit.p2EndColor[0] =
+            blureInit.p2EndColor[1] = 255;
+
+    blureInit.p2StartColor[3] = 64;
+    blureInit.p1StartColor[3] = 200;
+    blureInit.p1StartColor[2] = 150;
+    blureInit.p1EndColor[3] = 0;
+    blureInit.elemDuration = 8;
+    blureInit.unkFlag = 0;
+    blureInit.calcMode = 2;
+    blureInit.p1EndColor[2] = 150;
+    blureInit.p2EndColor[2] = 255;
+    blureInit.p2EndColor[3] = 0;
+    Effect_Add(globalCtx, this->blureIdx, EFFECT_BLURE1, 0, 0, &blureInit);
+    func_80A74714(this);
+    if (this->switchFlags != 0xFF) {
+        if (Flags_GetSwitch(globalCtx, this->switchFlags)) {
+            Actor_Kill(&this->actor);
+        }
+    } else if ((this->actor.params != 0) && Flags_GetClear(globalCtx, globalCtx->roomCtx.curRoom.num)) {
+        Actor_Kill(&this->actor);
+    }
+}
+#else
 #pragma GLOBAL_ASM("asm/non_matchings/overlays/actors/ovl_En_Ik/func_80A74398.s")
+#endif
 
 #pragma GLOBAL_ASM("asm/non_matchings/overlays/actors/ovl_En_Ik/func_80A745E4.s")
 
@@ -144,7 +238,15 @@ const ActorInit En_Ik_InitVars = {
 
 #pragma GLOBAL_ASM("asm/non_matchings/overlays/actors/ovl_En_Ik/func_80A77B3C.s")
 
-#pragma GLOBAL_ASM("asm/non_matchings/overlays/actors/ovl_En_Ik/EnIk_Update.s")
+void EnIk_Update(Actor* thisx, GlobalContext* globalCtx) {
+    EnIk* this = THIS;
+
+    if (this->action < 0 || this->action > ARRAY_COUNT(D_80A78604) || D_80A78604[this->action] == NULL) {
+        osSyncPrintf(VT_FGCOL(RED) "メインモードがおかしい!!!!!!!!!!!!!!!!!!!!!!!!!\n" VT_RST);
+    } else {
+        D_80A78604[this->action](this, globalCtx);
+    }
+}
 
 #pragma GLOBAL_ASM("asm/non_matchings/overlays/actors/ovl_En_Ik/func_80A77BF8.s")
 
@@ -154,7 +256,15 @@ const ActorInit En_Ik_InitVars = {
 
 #pragma GLOBAL_ASM("asm/non_matchings/overlays/actors/ovl_En_Ik/func_80A77EDC.s")
 
-#pragma GLOBAL_ASM("asm/non_matchings/overlays/actors/ovl_En_Ik/EnIk_Draw.s")
+void EnIk_Draw(Actor* thisx, GlobalContext* globalCtx) {
+    EnIk* this = THIS;
+
+    if (this->drawMode < 0 || this->drawMode > ARRAY_COUNT(D_80A7861C) || D_80A7861C[this->drawMode] == NULL) {
+        osSyncPrintf(VT_FGCOL(RED) "描画モードがおかしい!!!!!!!!!!!!!!!!!!!!!!!!!\n" VT_RST);
+    } else {
+        D_80A7861C[this->drawMode](this, globalCtx);
+    }
+}
 
 #pragma GLOBAL_ASM("asm/non_matchings/overlays/actors/ovl_En_Ik/func_80A780D0.s")
 
@@ -162,4 +272,18 @@ const ActorInit En_Ik_InitVars = {
 
 #pragma GLOBAL_ASM("asm/non_matchings/overlays/actors/ovl_En_Ik/func_80A781CC.s")
 
-#pragma GLOBAL_ASM("asm/non_matchings/overlays/actors/ovl_En_Ik/EnIk_Init.s")
+void EnIk_Init(Actor* thisx, GlobalContext* globalCtx) {
+    EnIk* this = THIS;
+    s32 flag = this->actor.params & 0xFF00;
+
+    if (((this->actor.params & 0xFF) == 0 && (gSaveContext.eventChkInf[3] & 0x1000)) ||
+        (flag != 0 && Flags_GetSwitch(globalCtx, flag >> 8))) {
+        Actor_Kill(&this->actor);
+    } else {
+        ActorShape_Init(&this->actor.shape, 0.0f, ActorShadow_DrawFunc_Circle, 30.0f);
+        SkelAnime_InitSV(globalCtx, &this->skelAnime, &D_0601E178, &D_0600C114, this->limbDrawTable,
+                         this->transitionDrawTable, 30);
+        func_80A74398(this, globalCtx);
+        func_80A780D0(this, globalCtx);
+    }
+}
diff --git a/src/overlays/actors/ovl_En_Ik/z_en_ik.h b/src/overlays/actors/ovl_En_Ik/z_en_ik.h
index 2cebf9be92..b9c29fee4e 100644
--- a/src/overlays/actors/ovl_En_Ik/z_en_ik.h
+++ b/src/overlays/actors/ovl_En_Ik/z_en_ik.h
@@ -8,7 +8,22 @@ struct EnIk;
 
 typedef struct EnIk {
     /* 0x0000 */ Actor actor;
-    /* 0x014C */ char unk_14C[0x390];
+    /* 0x014C */ SkelAnime skelAnime;
+    /* 0x0190 */ Vec3s limbDrawTable[30];
+    /* 0x0244 */ Vec3s transitionDrawTable[30];
+    /* 0x02F8 */ char unk_2F8[0x04];
+    /* 0x02FC */ s8 unk_2FC;
+    /* 0x02FD */ char unk_2FD[0x05];
+    /* 0x0302 */ s16 switchFlags;
+    /* 0x0304 */ char unk_304[0x1C];
+    /* 0x0320 */ ColliderCylinder unk_320;
+    /* 0x036C */ ColliderQuad unk_36C;
+    /* 0x03EC */ ColliderTris unk_3EC;
+    /* 0x040C */ char unk_40C[0xB8];
+    /* 0x04C4 */ s32 blureIdx;
+    /* 0x04C8 */ s32 action;
+    /* 0x04CC */ s32 drawMode;
+    /* 0x04D0 */ char unk_4D0[0x0C];
 } EnIk; // size = 0x04DC
 
 extern const ActorInit En_Ik_InitVars;
diff --git a/undefined_syms.txt b/undefined_syms.txt
index 2159cc4deb..5d29e5446d 100644
--- a/undefined_syms.txt
+++ b/undefined_syms.txt
@@ -1108,6 +1108,10 @@ D_06000950 = 0x06000950;
 D_060009D0 = 0x060009D0;
 D_06000A60 = 0x06000A60;
 
+// z_en_ik
+D_0601E178 = 0x0601E178;
+D_0600C114 = 0x0600C114;
+
 // z_en_insect
 D_04035590 = 0x04035590;
 D_040341FC = 0x040341FC;