diff --git a/asm/field_map_obj.s b/asm/field_map_obj.s
index 623146ed31..12b1cf7b46 100755
--- a/asm/field_map_obj.s
+++ b/asm/field_map_obj.s
@@ -5,174 +5,6 @@
 
 	.text
 
-	thumb_func_start FieldObjectCB_RandomlyLookEastOrWest
-FieldObjectCB_RandomlyLookEastOrWest: @ 8090190
-	push {lr}
-	adds r1, r0, 0
-	movs r0, 0x2E
-	ldrsh r2, [r1, r0]
-	lsls r0, r2, 3
-	adds r0, r2
-	lsls r0, 2
-	ldr r2, =gMapObjects
-	adds r0, r2
-	ldr r2, =FieldObjectCB2_RandomlyLookEastOrWest
-	bl FieldObjectStep
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end FieldObjectCB_RandomlyLookEastOrWest
-
-	thumb_func_start FieldObjectCB2_RandomlyLookEastOrWest
-FieldObjectCB2_RandomlyLookEastOrWest: @ 80901B4
-	push {r4,lr}
-	ldr r3, =gUnknown_0850D7C8
-	movs r4, 0x30
-	ldrsh r2, [r1, r4]
-	lsls r2, 2
-	adds r2, r3
-	ldr r2, [r2]
-	bl _call_via_r2
-	lsls r0, 24
-	lsrs r0, 24
-	pop {r4}
-	pop {r1}
-	bx r1
-	.pool
-	thumb_func_end FieldObjectCB2_RandomlyLookEastOrWest
-
-	thumb_func_start sub_80901D4
-sub_80901D4: @ 80901D4
-	push {r4,lr}
-	adds r4, r1, 0
-	bl npc_reset
-	movs r0, 0x1
-	strh r0, [r4, 0x30]
-	pop {r4}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_80901D4
-
-	thumb_func_start sub_80901E8
-sub_80901E8: @ 80901E8
-	push {r4,r5,lr}
-	adds r4, r0, 0
-	adds r5, r1, 0
-	ldrb r0, [r4, 0x18]
-	lsls r0, 28
-	lsrs r0, 28
-	bl GetFaceDirectionAnimId
-	adds r2, r0, 0
-	lsls r2, 24
-	lsrs r2, 24
-	adds r0, r4, 0
-	adds r1, r5, 0
-	bl FieldObjectSetRegularAnim
-	movs r0, 0x2
-	strh r0, [r5, 0x30]
-	movs r0, 0x1
-	pop {r4,r5}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_80901E8
-
-	thumb_func_start sub_8090214
-sub_8090214: @ 8090214
-	push {r4-r7,lr}
-	adds r6, r0, 0
-	adds r7, r1, 0
-	bl FieldObjectExecRegularAnim
-	lsls r0, 24
-	cmp r0, 0
-	beq _0809024A
-	ldr r4, =gUnknown_0850D6DC
-	bl Random
-	movs r5, 0x3
-	adds r1, r5, 0
-	ands r1, r0
-	lsls r1, 1
-	adds r1, r4
-	movs r0, 0
-	ldrsh r1, [r1, r0]
-	adds r0, r7, 0
-	bl SetFieldObjectStepTimer
-	ldrb r1, [r6]
-	movs r0, 0x3
-	negs r0, r0
-	ands r0, r1
-	strb r0, [r6]
-	strh r5, [r7, 0x30]
-_0809024A:
-	movs r0, 0
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	.pool
-	thumb_func_end sub_8090214
-
-	thumb_func_start sub_8090258
-sub_8090258: @ 8090258
-	push {r4,r5,lr}
-	adds r4, r0, 0
-	adds r5, r1, 0
-	adds r0, r5, 0
-	bl RunFieldObjectStepTimer
-	lsls r0, 24
-	cmp r0, 0
-	bne _08090276
-	adds r0, r4, 0
-	bl FieldObjectIsTrainerAndCloseToPlayer
-	lsls r0, 24
-	cmp r0, 0
-	beq _0809027E
-_08090276:
-	movs r0, 0x4
-	strh r0, [r5, 0x30]
-	movs r0, 0x1
-	b _08090280
-_0809027E:
-	movs r0, 0
-_08090280:
-	pop {r4,r5}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_8090258
-
-	thumb_func_start sub_8090288
-sub_8090288: @ 8090288
-	push {r4,r5,lr}
-	sub sp, 0x4
-	adds r4, r0, 0
-	adds r5, r1, 0
-	ldr r1, =gUnknown_0850D790
-	mov r0, sp
-	movs r2, 0x2
-	bl memcpy
-	adds r0, r4, 0
-	movs r1, 0x2
-	bl GetRunningPastFacingDirection
-	lsls r0, 24
-	lsrs r1, r0, 24
-	cmp r1, 0
-	bne _080902B8
-	bl Random
-	movs r1, 0x1
-	ands r1, r0
-	mov r2, sp
-	adds r0, r2, r1
-	ldrb r1, [r0]
-_080902B8:
-	adds r0, r4, 0
-	bl FieldObjectSetDirection
-	movs r0, 0x1
-	strh r0, [r5, 0x30]
-	add sp, 0x4
-	pop {r4,r5}
-	pop {r1}
-	bx r1
-	.pool
-	thumb_func_end sub_8090288
-
 	thumb_func_start FieldObjectCB_RandomlyLookNorthOrWest
 FieldObjectCB_RandomlyLookNorthOrWest: @ 80902D0
 	push {lr}
diff --git a/src/field_map_obj.c b/src/field_map_obj.c
index 88b4ab9b70..7c99c8a979 100755
--- a/src/field_map_obj.c
+++ b/src/field_map_obj.c
@@ -2433,3 +2433,56 @@ bool8 sub_8090148 (struct MapObject *mapObject, struct Sprite *sprite)
     sprite->data1 = 1;
     return TRUE;
 }
+
+field_object_step(RandomlyLookEastOrWest, gUnknown_0850D7C8)
+
+bool8 sub_80901D4 (struct MapObject *mapObject, struct Sprite *sprite)
+{
+    npc_reset(mapObject, sprite);
+    sprite->data1 = 1;
+    return TRUE;
+}
+
+bool8 sub_80901E8 (struct MapObject *mapObject, struct Sprite *sprite)
+{
+    FieldObjectSetRegularAnim(mapObject, sprite, GetFaceDirectionAnimId(mapObject->mapobj_unk_18));
+    sprite->data1 = 2;
+    return TRUE;
+}
+
+bool8 sub_8090214 (struct MapObject *mapObject, struct Sprite *sprite)
+{
+    if (FieldObjectExecRegularAnim(mapObject, sprite))
+    {
+        SetFieldObjectStepTimer(sprite, gUnknown_0850D6DC[Random() & 0x03]);
+        mapObject->mapobj_bit_1 = FALSE;
+        sprite->data1 = 3;
+    }
+    return FALSE;
+}
+
+bool8 sub_8090258 (struct MapObject *mapObject, struct Sprite *sprite)
+{
+    if (RunFieldObjectStepTimer(sprite) || FieldObjectIsTrainerAndCloseToPlayer(mapObject))
+    {
+        sprite->data1 = 4;
+        return TRUE;
+    }
+    return FALSE;
+}
+
+bool8 sub_8090288 (struct MapObject *mapObject, struct Sprite *sprite)
+{
+    u8 directions[2];
+    u8 direction;
+
+    memcpy(directions, gUnknown_0850D790, sizeof gUnknown_0850D790);
+    direction = GetRunningPastFacingDirection(mapObject, 2);
+    if (direction == 0)
+    {
+        direction = directions[Random() & 0x01];
+    }
+    FieldObjectSetDirection(mapObject, direction);
+    sprite->data1 = 1;
+    return TRUE;
+}