diff --git a/asm/non_matching/manager1D/Manager1D_Main.inc b/asm/non_matching/manager1D/Manager1D_Main.inc
deleted file mode 100644
index fab27c34..00000000
--- a/asm/non_matching/manager1D/Manager1D_Main.inc
+++ /dev/null
@@ -1,12 +0,0 @@
-	.syntax unified
-	push {lr}
-	ldr r2, _0805B5DC @ =gUnk_08108C80
-	ldrb r1, [r0, #0xc]
-	lsls r1, r1, #2
-	adds r1, r1, r2
-	ldr r1, [r1]
-	bl _call_via_r1
-	pop {pc}
-	.align 2, 0
-_0805B5DC: .4byte gUnk_08108C80
-	.syntax divided
diff --git a/asm/non_matching/manager1D/sub_0805B5E0.inc b/asm/non_matching/manager1D/sub_0805B5E0.inc
deleted file mode 100644
index 7cfa013f..00000000
--- a/asm/non_matching/manager1D/sub_0805B5E0.inc
+++ /dev/null
@@ -1,47 +0,0 @@
-	.syntax unified
-	push {r4, r5, lr}
-	movs r4, #0
-	movs r1, #1
-	strb r1, [r0, #0xc]
-	ldr r3, _0805B618 @ =gScreen
-	ldrh r2, [r3]
-	movs r5, #0x80
-	lsls r5, r5, #4
-	adds r1, r5, #0
-	orrs r1, r2
-	strh r1, [r3]
-	ldr r2, _0805B61C @ =gUnk_08108C88
-	ldrb r1, [r0, #0xa]
-	lsls r1, r1, #1
-	adds r1, r1, r2
-	ldrh r1, [r1]
-	strh r1, [r3, #0x2c]
-	ldr r1, _0805B620 @ =gRoomControls
-	str r4, [r1, #0x2c]
-	str r4, [r1, #0x28]
-	ldrb r0, [r0, #0xa]
-	cmp r0, #0
-	beq _0805B612
-	cmp r0, #1
-	beq _0805B624
-_0805B612:
-	strh r4, [r3, #0x30]
-	strh r4, [r3, #0x2e]
-	b _0805B634
-	.align 2, 0
-_0805B618: .4byte gScreen
-_0805B61C: .4byte gUnk_08108C88
-_0805B620: .4byte gRoomControls
-_0805B624:
-	ldrh r0, [r1, #0x2a]
-	ldrh r2, [r1, #0xa]
-	adds r0, r0, r2
-	strh r0, [r3, #0x2e]
-	ldrh r0, [r1, #0x2e]
-	ldrh r1, [r1, #0xc]
-	adds r0, r0, r1
-	strh r0, [r3, #0x30]
-_0805B634:
-	pop {r4, r5, pc}
-	.align 2, 0
-	.syntax divided
diff --git a/asm/non_matching/manager1D/sub_0805B638.inc b/asm/non_matching/manager1D/sub_0805B638.inc
deleted file mode 100644
index fb210c75..00000000
--- a/asm/non_matching/manager1D/sub_0805B638.inc
+++ /dev/null
@@ -1,26 +0,0 @@
-	.syntax unified
-	push {lr}
-	ldrb r0, [r0, #0xa]
-	cmp r0, #1
-	bne _0805B65E
-	ldr r1, _0805B660 @ =gRoomControls
-	ldr r0, [r1, #0x28]
-	movs r2, #0x80
-	lsls r2, r2, #6
-	adds r0, r0, r2
-	str r0, [r1, #0x28]
-	ldr r2, _0805B664 @ =gScreen
-	ldrh r0, [r1, #0x2a]
-	ldrh r3, [r1, #0xa]
-	adds r0, r0, r3
-	strh r0, [r2, #0x2e]
-	ldrh r0, [r1, #0x2e]
-	ldrh r1, [r1, #0xc]
-	adds r0, r0, r1
-	strh r0, [r2, #0x30]
-_0805B65E:
-	pop {pc}
-	.align 2, 0
-_0805B660: .4byte gRoomControls
-_0805B664: .4byte gScreen
-	.syntax divided
diff --git a/src/manager/manager1D.c b/src/manager/manager1D.c
index 4c192909..2e52aaf6 100644
--- a/src/manager/manager1D.c
+++ b/src/manager/manager1D.c
@@ -1,7 +1,40 @@
 #include "manager.h"
+#include "room.h"
+#include "screen.h"
 
-ASM_FUNC("asm/non_matching/manager1D/Manager1D_Main.inc", void Manager1D_Main())
+extern void (*const gUnk_08108C80[])(Manager*);
 
-ASM_FUNC("asm/non_matching/manager1D/sub_0805B5E0.inc", void sub_0805B5E0())
+extern u16 gUnk_08108C88[];
 
-ASM_FUNC("asm/non_matching/manager1D/sub_0805B638.inc", void sub_0805B638())
\ No newline at end of file
+void Manager1D_Main(Manager* this) {
+    gUnk_08108C80[this->action](this);
+}
+
+void sub_0805B5E0(Manager* this) {
+    this->action = 1;
+
+    gScreen.lcd.displayControl |= 0x800;
+    gScreen.affine.bg3Control = gUnk_08108C88[this->unk_0a];
+    gRoomControls.bg3OffsetY.WORD = 0;
+    gRoomControls.bg3OffsetX.WORD = 0;
+
+    switch (this->unk_0a) {
+        case 0:
+        default:
+            gScreen.affine.bg3yOffset = 0;
+            gScreen.affine.bg3xOffset = 0;
+        break;
+        case 1:
+            gScreen.affine.bg3xOffset = gRoomControls.roomScrollX + gRoomControls.bg3OffsetX.HALF.HI;
+            gScreen.affine.bg3yOffset = gRoomControls.roomScrollY + gRoomControls.bg3OffsetY.HALF.HI;
+        break;
+    }
+}
+
+void sub_0805B638(Manager* this) {
+    if (this->unk_0a == 1) {
+        gRoomControls.bg3OffsetX.WORD = gRoomControls.bg3OffsetX.WORD + 0x2000;
+        gScreen.affine.bg3xOffset = gRoomControls.roomScrollX + gRoomControls.bg3OffsetX.HALF.HI ;
+        gScreen.affine.bg3yOffset = gRoomControls.roomScrollY + gRoomControls.bg3OffsetY.HALF.HI;
+    }
+}
\ No newline at end of file
diff --git a/src/manager/manager33.c b/src/manager/manager33.c
index eb88a953..25d630d6 100644
--- a/src/manager/manager33.c
+++ b/src/manager/manager33.c
@@ -1,3 +1,3 @@
 #include "manager.h"
 
-ASM_FUNC("asm/non_matching/manager33/Manager33_Main.inc", void Manager33_Main())
\ No newline at end of file
+ASM_FUNC("asm/non_matching/manager33/Manager33_Main.inc", void Manager33_Main(Manager* this))
\ No newline at end of file