diff --git a/asm/link_rfu.s b/asm/link_rfu.s
index c5eaa2faa2..dfc434f67b 100644
--- a/asm/link_rfu.s
+++ b/asm/link_rfu.s
@@ -5,238 +5,6 @@
 
 	.text
 
-	thumb_func_start sub_800C36C
-sub_800C36C: @ 800C36C
-	push {r4-r7,lr}
-	mov r7, r9
-	mov r6, r8
-	push {r6,r7}
-	sub sp, 0x4
-	lsls r0, 16
-	lsrs r0, 16
-	movs r1, 0
-	mov r8, r1
-	mov r5, sp
-	adds r5, 0x1
-	mov r4, sp
-	adds r4, 0x2
-	mov r1, sp
-	adds r2, r5, 0
-	adds r3, r4, 0
-	bl rfu_REQBN_watchLink
-	mov r0, sp
-	ldrb r0, [r0]
-	adds r7, r4, 0
-	cmp r0, 0
-	beq _0800C43E
-	ldr r1, =gUnknown_03004140
-	mov r0, sp
-	ldrb r0, [r0]
-	strh r0, [r1, 0x14]
-	ldrb r0, [r5]
-	strh r0, [r1, 0x16]
-	ldrb r0, [r1, 0x9]
-	adds r6, r1, 0
-	cmp r0, 0
-	beq _0800C426
-	movs r0, 0x1
-	strb r0, [r6, 0xA]
-	ldrb r0, [r6, 0x6]
-	cmp r0, 0
-	bne _0800C3C2
-	ldrb r0, [r5]
-	cmp r0, 0
-	bne _0800C3C2
-	movs r0, 0x4
-	strb r0, [r6, 0xA]
-_0800C3C2:
-	ldrb r0, [r6, 0xA]
-	cmp r0, 0x1
-	bne _0800C40C
-	movs r2, 0
-	mov r4, sp
-	movs r5, 0x1
-	mov r12, r6
-	mov r3, r12
-	adds r3, 0x30
-	movs r6, 0x34
-	add r6, r12
-	mov r9, r6
-_0800C3DA:
-	ldrb r0, [r4]
-	asrs r0, r2
-	ands r0, r5
-	cmp r0, 0
-	beq _0800C3F8
-	adds r0, r5, 0
-	lsls r0, r2
-	ldrb r1, [r3]
-	orrs r0, r1
-	strb r0, [r3]
-	lsls r0, r2, 1
-	add r0, r9
-	mov r6, r12
-	ldrh r1, [r6, 0x32]
-	strh r1, [r0]
-_0800C3F8:
-	adds r0, r2, 0x1
-	lsls r0, 24
-	lsrs r2, r0, 24
-	cmp r2, 0x3
-	bls _0800C3DA
-	movs r0, 0x31
-	b _0800C41E
-	.pool
-_0800C40C:
-	movs r0, 0
-	strb r0, [r6, 0xA]
-	mov r0, sp
-	ldrb r0, [r0]
-	bl sub_800D334
-	movs r0, 0x1
-	mov r8, r0
-	movs r0, 0x33
-_0800C41E:
-	movs r1, 0x1
-	bl sub_800D30C
-	b _0800C43A
-_0800C426:
-	mov r0, sp
-	ldrb r0, [r0]
-	bl sub_800D334
-	movs r1, 0x1
-	mov r8, r1
-	movs r0, 0x30
-	movs r1, 0x2
-	bl sub_800D30C
-_0800C43A:
-	bl sub_800D610
-_0800C43E:
-	ldr r0, =gUnknown_03007890
-	ldr r0, [r0]
-	ldrb r0, [r0]
-	cmp r0, 0x1
-	bne _0800C518
-	ldrb r0, [r7]
-	cmp r0, 0
-	beq _0800C49C
-	movs r2, 0
-	ldr r6, =gUnknown_03004140
-	movs r3, 0x1
-	adds r4, r6, 0
-	adds r4, 0x34
-	adds r6, 0x30
-	adds r5, r7, 0
-_0800C45C:
-	ldrb r0, [r6]
-	asrs r0, r2
-	ands r0, r3
-	cmp r0, 0
-	beq _0800C478
-	ldrb r0, [r5]
-	asrs r0, r2
-	ands r0, r3
-	cmp r0, 0
-	beq _0800C478
-	lsls r0, r2, 1
-	adds r0, r4
-	movs r1, 0
-	strh r1, [r0]
-_0800C478:
-	adds r0, r2, 0x1
-	lsls r0, 24
-	lsrs r2, r0, 24
-	cmp r2, 0x3
-	bls _0800C45C
-	ldr r3, =gUnknown_03004140
-	adds r2, r3, 0
-	adds r2, 0x30
-	ldrb r1, [r7]
-	ldrb r0, [r2]
-	bics r0, r1
-	strb r0, [r2]
-	ldrb r0, [r7]
-	strh r0, [r3, 0x14]
-	movs r0, 0x32
-	movs r1, 0x1
-	bl sub_800D30C
-_0800C49C:
-	ldr r0, =gUnknown_03004140
-	adds r3, r0, 0
-	adds r3, 0x30
-	ldrb r1, [r3]
-	adds r6, r0, 0
-	cmp r1, 0
-	beq _0800C514
-	movs r4, 0
-	movs r2, 0
-	movs r5, 0x1
-_0800C4B0:
-	ldrb r0, [r3]
-	asrs r0, r2
-	ands r0, r5
-	cmp r0, 0
-	beq _0800C4E2
-	lsls r1, r2, 1
-	adds r0, r6, 0
-	adds r0, 0x34
-	adds r1, r0
-	ldrh r0, [r1]
-	cmp r0, 0
-	beq _0800C4E2
-	subs r0, 0x1
-	strh r0, [r1]
-	lsls r0, 16
-	cmp r0, 0
-	bne _0800C4E2
-	adds r0, r5, 0
-	lsls r0, r2
-	ldrb r1, [r3]
-	bics r1, r0
-	strb r1, [r3]
-	orrs r4, r0
-	lsls r0, r4, 24
-	lsrs r4, r0, 24
-_0800C4E2:
-	adds r0, r2, 0x1
-	lsls r0, 24
-	lsrs r2, r0, 24
-	cmp r2, 0x3
-	bls _0800C4B0
-	cmp r4, 0
-	beq _0800C506
-	adds r0, r4, 0
-	bl sub_800D334
-	movs r6, 0x1
-	mov r8, r6
-	ldr r0, =gUnknown_03004140
-	strh r4, [r0, 0x14]
-	movs r0, 0x33
-	movs r1, 0x1
-	bl sub_800D30C
-_0800C506:
-	ldr r0, =gUnknown_03004140
-	adds r1, r0, 0
-	adds r1, 0x30
-	ldrb r1, [r1]
-	adds r6, r0, 0
-	cmp r1, 0
-	bne _0800C518
-_0800C514:
-	movs r0, 0
-	strb r0, [r6, 0xA]
-_0800C518:
-	mov r0, r8
-	add sp, 0x4
-	pop {r3,r4}
-	mov r8, r3
-	mov r9, r4
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	.pool
-	thumb_func_end sub_800C36C
-
 	thumb_func_start rfu_syncVBlank_
 rfu_syncVBlank_: @ 800C530
 	push {lr}
diff --git a/include/librfu.h b/include/librfu.h
index 292b144064..45b3e1cd33 100644
--- a/include/librfu.h
+++ b/include/librfu.h
@@ -157,3 +157,4 @@ void rfu_REQ_sendData(u8);
 void rfu_setMSCCallback(void (*func)(u16));
 void rfu_setREQCallback(void (*func)(u16, u16));
 bool8 rfu_getMasterSlave(void);
+void rfu_REQBN_watchLink(u16 a0, u8 *a1, u8 *a2, u8 *a3);
diff --git a/include/link_rfu.h b/include/link_rfu.h
index 424a4767f6..e9b6548a58 100644
--- a/include/link_rfu.h
+++ b/include/link_rfu.h
@@ -52,7 +52,7 @@ struct UnkRfuStruct_1 {
     /* 0x012 */ u8 unk_12;
     // aligned
     /* 0x014 */ u16 unk_14;
-    /* 0x016 */ u8 filler_16[2];
+    /* 0x016 */ u16 unk_16;
     /* 0x018 */ u16 unk_18;
     /* 0x01a */ u16 unk_1a;
     /* 0x01c */ u8 filler_1c[2];
diff --git a/src/link_rfu.c b/src/link_rfu.c
index 9cc4b497a2..f0439eac32 100644
--- a/src/link_rfu.c
+++ b/src/link_rfu.c
@@ -350,3 +350,95 @@ void sub_800C27C(bool8 a0)
         }
     }
 }
+
+bool8 sub_800C36C(u16 a0)
+{
+    bool8 retVal;
+    u8 i;
+    u8 sp0;
+    u8 sp1;
+    u8 sp2;
+    u8 flags;
+
+    retVal = FALSE;
+    rfu_REQBN_watchLink(a0, &sp0, &sp1, &sp2);
+    if (sp0)
+    {
+        gUnknown_03004140.unk_14 = sp0;
+        gUnknown_03004140.unk_16 = sp1;
+        if (gUnknown_03004140.unk_09)
+        {
+            gUnknown_03004140.unk_0a = 1;
+            if (gUnknown_03004140.unk_06 == 0 && sp1 == 0)
+            {
+                gUnknown_03004140.unk_0a = 4;
+            }
+            if (gUnknown_03004140.unk_0a == 1)
+            {
+                for (i = 0; i < 4; i++)
+                {
+                    if ((sp0 >> i) & 1)
+                    {
+                        gUnknown_03004140.unk_30 |= (1 << i);
+                        gUnknown_03004140.unk_34[i] = gUnknown_03004140.unk_32;
+                    }
+                }
+                sub_800D30C(0x31, 0x01);
+            }
+            else
+            {
+                gUnknown_03004140.unk_0a = 0;
+                sub_800D334(sp0);
+                retVal = TRUE;
+                sub_800D30C(0x33, 0x01);
+            }
+        }
+        else
+        {
+            sub_800D334(sp0);
+            retVal = TRUE;
+            sub_800D30C(0x30, 0x02);
+        }
+        sub_800D610();
+    }
+    if (gUnknown_03007890->unk_00 == 1)
+    {
+        if (sp2)
+        {
+            for (i = 0; i < 4; i++)
+            {
+                if ((gUnknown_03004140.unk_30 >> i) & 1 && (sp2 >> i) & 1)
+                {
+                    gUnknown_03004140.unk_34[i] = 0;
+                }
+            }
+            gUnknown_03004140.unk_30 &= ~sp2;
+            gUnknown_03004140.unk_14 = sp2;
+            sub_800D30C(0x32, 0x01);
+        }
+        if (gUnknown_03004140.unk_30)
+        {
+            flags = 0;
+            for (i = 0; i < 4; i++)
+            {
+                if ((gUnknown_03004140.unk_30 >> i) & 1 && gUnknown_03004140.unk_34[i] && --gUnknown_03004140.unk_34[i] == 0)
+                {
+                    gUnknown_03004140.unk_30 &= ~(1 << i);
+                    flags |= (1 << i);
+                }
+            }
+            if (flags)
+            {
+                sub_800D334(flags);
+                retVal = TRUE;
+                gUnknown_03004140.unk_14 = flags;
+                sub_800D30C(0x33, 0x01);
+            }
+        }
+        if (!gUnknown_03004140.unk_30)
+        {
+            gUnknown_03004140.unk_0a = 0;
+        }
+    }
+    return retVal;
+}