diff --git a/linker_scripts/code_script.txt b/linker_scripts/code_script.txt
index 954e322bfc..73bdb88021 100644
--- a/linker_scripts/code_script.txt
+++ b/linker_scripts/code_script.txt
@@ -2294,9 +2294,9 @@ SECTIONS
     ovl_Item_Inbox : AT(RomLocation)
     {
         build/src/overlays/actors/ovl_Item_Inbox/z_item_inbox.o(.text)
-        build/asm/overlays/ovl_Item_Inbox_data.o(.data)
+        build/src/overlays/actors/ovl_Item_Inbox/z_item_inbox.o(.data)
         build/src/overlays/actors/ovl_Item_Inbox/z_item_inbox.o(.rodata)
-        build/asm/overlays/ovl_Item_Inbox_rodata.o(.rodata)
+        build/src/overlays/actors/ovl_Item_Inbox/z_item_inbox_overlay.o(.ovl)
     }
     SegmentEnd = .;
     SegmentSize = SegmentEnd - SegmentStart;
diff --git a/src/overlays/actors/ovl_Item_Inbox/z_item_inbox.c b/src/overlays/actors/ovl_Item_Inbox/z_item_inbox.c
index e0eac8a834..0cb0bca1c1 100644
--- a/src/overlays/actors/ovl_Item_Inbox/z_item_inbox.c
+++ b/src/overlays/actors/ovl_Item_Inbox/z_item_inbox.c
@@ -9,7 +9,8 @@ void ItemInbox_Destroy(Actor* thisx, GlobalContext* globalCtx);
 void ItemInbox_Update(Actor* thisx, GlobalContext* globalCtx);
 void ItemInbox_Draw(Actor* thisx, GlobalContext* globalCtx);
 
-/*
+void ItemInbox_Idle(ItemInbox* this, GlobalContext* globalCtx);
+
 const ActorInit Item_Inbox_InitVars = {
     ACTOR_ITEM_INBOX,
     ACTORCAT_NPC,
@@ -21,14 +22,33 @@ const ActorInit Item_Inbox_InitVars = {
     (ActorFunc)ItemInbox_Update,
     (ActorFunc)ItemInbox_Draw
 };
-*/
 
-#pragma GLOBAL_ASM("./asm/non_matchings/overlays/ovl_Item_Inbox_0x809454F0/ItemInbox_Init.asm")
+void ItemInbox_Init(Actor* thisx, GlobalContext* globalCtx) {
+    ItemInbox* this = THIS;
 
-#pragma GLOBAL_ASM("./asm/non_matchings/overlays/ovl_Item_Inbox_0x809454F0/ItemInbox_Destroy.asm")
+    this->actionFunc = ItemInbox_Idle;
+    Actor_SetScale(&this->actor, 0.2f);
+}
 
-#pragma GLOBAL_ASM("./asm/non_matchings/overlays/ovl_Item_Inbox_0x809454F0/func_80945534.asm")
+void ItemInbox_Destroy(Actor* thisx, GlobalContext* globalCtx) {
+}
 
-#pragma GLOBAL_ASM("./asm/non_matchings/overlays/ovl_Item_Inbox_0x809454F0/ItemInbox_Update.asm")
+void ItemInbox_Idle(ItemInbox* this, GlobalContext* globalCtx) {
+    if (Actor_GetChestFlag(globalCtx, (this->actor.params >> 8) & 0x1F)) {
+        Actor_MarkForDeath(&this->actor);
+    }
+}
 
-#pragma GLOBAL_ASM("./asm/non_matchings/overlays/ovl_Item_Inbox_0x809454F0/ItemInbox_Draw.asm")
+void ItemInbox_Update(Actor* thisx, GlobalContext* globalCtx) {
+    ItemInbox* this = THIS;
+
+    this->actionFunc(this, globalCtx);
+}
+
+void ItemInbox_Draw(Actor* thisx, GlobalContext* globalCtx) {
+    ItemInbox* this = THIS;
+
+    func_800B8050(&this->actor, globalCtx, 0);
+    func_800B8118(&this->actor, globalCtx, 0);
+    GetItem_Draw(globalCtx, this->actor.params & 0xFF);
+}
diff --git a/src/overlays/actors/ovl_Item_Inbox/z_item_inbox.h b/src/overlays/actors/ovl_Item_Inbox/z_item_inbox.h
index 9c9b42b0f1..98f6b79ba5 100644
--- a/src/overlays/actors/ovl_Item_Inbox/z_item_inbox.h
+++ b/src/overlays/actors/ovl_Item_Inbox/z_item_inbox.h
@@ -5,9 +5,11 @@
 
 struct ItemInbox;
 
+typedef void (*ItemInboxActionFunc)(struct ItemInbox*, GlobalContext*);
+
 typedef struct ItemInbox {
     /* 0x000 */ Actor actor;
-    /* 0x144 */ char unk_144[0x4];
+    /* 0x144 */ ItemInboxActionFunc actionFunc;
 } ItemInbox; // size = 0x148
 
 extern const ActorInit Item_Inbox_InitVars;
diff --git a/tables/functions.txt b/tables/functions.txt
index 3cdda5fe94..b7c5e1906b 100644
--- a/tables/functions.txt
+++ b/tables/functions.txt
@@ -7547,7 +7547,7 @@
     0x80945310:("func_80945310",),
     0x809454F0:("ItemInbox_Init",),
     0x80945524:("ItemInbox_Destroy",),
-    0x80945534:("func_80945534",),
+    0x80945534:("ItemInbox_Idle",),
     0x8094557C:("ItemInbox_Update",),
     0x809455A0:("ItemInbox_Draw",),
     0x80945650:("EnGe1_Init",),