maybe_shadow_1 which may or may not be a shadow

asm/field_map_obj.s

@@ -5,132 +5,6 @@
 
 	.text
 
-	thumb_func_start sub_8093FC4
-sub_8093FC4: @ 8093FC4
-	push {r4-r7,lr}
-	mov r7, r10
-	mov r6, r9
-	mov r5, r8
-	push {r5-r7}
-	sub sp, 0x10
-	adds r7, r0, 0
-	mov r10, r1
-	adds r4, r2, 0
-	mov r8, r3
-	ldr r0, [sp, 0x30]
-	lsls r4, 24
-	lsrs r4, 24
-	mov r1, r8
-	lsls r1, 24
-	lsrs r1, 24
-	mov r8, r1
-	lsls r0, 24
-	lsrs r0, 24
-	mov r9, r0
-	ldr r1, =gUnknown_0850DFBC
-	add r0, sp, 0x4
-	movs r2, 0x6
-	bl memcpy
-	add r5, sp, 0xC
-	movs r0, 0
-	strh r0, [r5]
-	mov r6, sp
-	adds r6, 0xE
-	strh r0, [r6]
-	adds r0, r7, 0
-	adds r1, r4, 0
-	bl FieldObjectSetDirection
-	mov r1, r8
-	lsls r0, r1, 1
-	add r0, sp
-	adds r0, 0x4
-	movs r1, 0
-	ldrsh r3, [r0, r1]
-	str r3, [sp]
-	adds r0, r4, 0
-	adds r1, r5, 0
-	adds r2, r6, 0
-	bl sub_8092F88
-	ldrh r1, [r5]
-	ldrh r0, [r7, 0x10]
-	adds r1, r0
-	lsls r1, 16
-	asrs r1, 16
-	ldrh r2, [r6]
-	ldrh r0, [r7, 0x12]
-	adds r2, r0
-	lsls r2, 16
-	asrs r2, 16
-	adds r0, r7, 0
-	bl npc_coords_shift
-	mov r0, r10
-	adds r1, r4, 0
-	mov r2, r8
-	mov r3, r9
-	bl sub_809783C
-	movs r0, 0x1
-	mov r1, r10
-	strh r0, [r1, 0x32]
-	movs r0, 0x2C
-	add r10, r0
-	mov r0, r10
-	ldrb r1, [r0]
-	movs r0, 0x41
-	negs r0, r0
-	ands r0, r1
-	mov r1, r10
-	strb r0, [r1]
-	ldrb r0, [r7]
-	movs r1, 0x4
-	orrs r0, r1
-	movs r1, 0x10
-	orrs r0, r1
-	strb r0, [r7]
-	add sp, 0x10
-	pop {r3-r5}
-	mov r8, r3
-	mov r9, r4
-	mov r10, r5
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_8093FC4
-
-	thumb_func_start maybe_shadow_1
-maybe_shadow_1: @ 8094080
-	push {r4,r5,lr}
-	sub sp, 0x4
-	adds r4, r0, 0
-	adds r5, r1, 0
-	ldr r0, [sp, 0x10]
-	lsls r2, 24
-	lsrs r2, 24
-	lsls r3, 24
-	lsrs r3, 24
-	lsls r0, 24
-	lsrs r0, 24
-	str r0, [sp]
-	adds r0, r4, 0
-	bl sub_8093FC4
-	ldrb r0, [r4, 0x18]
-	lsls r0, 28
-	lsrs r0, 28
-	bl get_go_image_anim_num
-	adds r2, r0, 0
-	lsls r2, 24
-	lsrs r2, 24
-	adds r0, r4, 0
-	adds r1, r5, 0
-	bl npc_apply_anim_looping
-	adds r0, r4, 0
-	bl DoShadowFieldEffect
-	add sp, 0x4
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	thumb_func_end maybe_shadow_1
-
 	thumb_func_start sub_80940C4
 @ int sub_80940C4(int a1, int a2, int a3)
 sub_80940C4: @ 80940C4

include/data3.h

@@ -44,5 +44,6 @@ extern const u8 gUnknown_0850DBA0[5];
 
 extern bool8 (*const *const gUnknown_0850DC50[])(struct MapObject *, struct Sprite *);
 extern u8 (*const gUnknown_0850DEE8[5])(u8);
+extern const s16 gUnknown_0850DFBC[3];
 
 #endif //GUARD_DATA3_H

include/map_obj_8097404.h

@@ -18,5 +18,7 @@ u8 sub_8097F78(struct MapObject *);
 bool8 obj_npc_ministep(struct Sprite *sprite);
 bool8 sub_80976EC(struct Sprite *sprite);
 void sub_80976DC(struct Sprite *, u8);
+void sub_809783C(struct Sprite *, u8, u8, u8);
+void DoShadowFieldEffect(struct MapObject *);
 
 #endif //GUARD_MAP_OBJ_8097404_H

src/field_map_obj.c

@@ -4263,3 +4263,28 @@ an_walk_any_2_macro(sub_8093F04, do_go_anim, npc_obj_ministep_stop_on_arrival, 2
 an_walk_any_2_macro(sub_8093F44, do_go_anim, npc_obj_ministep_stop_on_arrival, 3, 0)
 an_walk_any_2_macro(sub_8093F84, do_go_anim, npc_obj_ministep_stop_on_arrival, 4, 0)
 
+void sub_8093FC4(struct MapObject *mapObject, struct Sprite *sprite, u8 direction, u8 speed, u8 a5)
+{
+    s16 displacements[ARRAY_COUNT(gUnknown_0850DFBC)];
+    s16 x;
+    s16 y;
+
+    memcpy(displacements, gUnknown_0850DFBC, sizeof gUnknown_0850DFBC);
+    x = 0;
+    y = 0;
+    FieldObjectSetDirection(mapObject, direction);
+    sub_8092F88(direction, &x, &y, displacements[speed], displacements[speed]);
+    npc_coords_shift(mapObject, mapObject->coords2.x + x, mapObject->coords2.y + y);
+    sub_809783C(sprite, direction, speed, a5);
+    sprite->data2 = 1;
+    sprite->animPaused = 0;
+    mapObject->mapobj_bit_2 = 1;
+    mapObject->mapobj_bit_4 = 1;
+}
+
+void maybe_shadow_1(struct MapObject *mapObject, struct Sprite *sprite, u8 direction, u8 speed, u8 a4)
+{
+    sub_8093FC4(mapObject, sprite, direction, speed, a4);
+    npc_apply_anim_looping(mapObject, sprite, get_go_image_anim_num(mapObject->mapobj_unk_18));
+    DoShadowFieldEffect(mapObject);
+}