diff --git a/asm/field_map_obj.s b/asm/field_map_obj.s
index 8a4931322..0f021ac94 100755
--- a/asm/field_map_obj.s
+++ b/asm/field_map_obj.s
@@ -5,74 +5,6 @@
 
 	.text
 
-	thumb_func_start FieldObjectIsTrainerAndCloseToPlayer
-@ bool8 FieldObjectIsTrainerAndCloseToPlayer(struct npc_state *fieldObject)
-FieldObjectIsTrainerAndCloseToPlayer: @ 808F58C
-	push {r4-r7,lr}
-	sub sp, 0x4
-	adds r5, r0, 0
-	movs r0, 0x80
-	bl TestPlayerAvatarFlags
-	lsls r0, 24
-	cmp r0, 0
-	beq _0808F5F8
-	ldrb r0, [r5, 0x7]
-	cmp r0, 0x1
-	beq _0808F5A8
-	cmp r0, 0x3
-	bne _0808F5F8
-_0808F5A8:
-	mov r7, sp
-	adds r7, 0x2
-	mov r0, sp
-	adds r1, r7, 0
-	bl PlayerGetDestCoords
-	ldrh r2, [r5, 0x10]
-	ldrh r4, [r5, 0x12]
-	ldrb r1, [r5, 0x1D]
-	subs r3, r2, r1
-	subs r0, r4, r1
-	lsls r0, 16
-	lsrs r5, r0, 16
-	adds r2, r1, r2
-	lsls r2, 16
-	lsrs r2, 16
-	adds r1, r4
-	lsls r1, 16
-	lsrs r6, r1, 16
-	mov r0, sp
-	lsls r3, 16
-	asrs r3, 16
-	movs r1, 0
-	ldrsh r4, [r0, r1]
-	cmp r3, r4
-	bgt _0808F5F8
-	lsls r0, r2, 16
-	asrs r0, 16
-	cmp r0, r4
-	blt _0808F5F8
-	lsls r0, r5, 16
-	asrs r0, 16
-	movs r2, 0
-	ldrsh r1, [r7, r2]
-	cmp r0, r1
-	bgt _0808F5F8
-	lsls r0, r6, 16
-	asrs r0, 16
-	cmp r0, r1
-	bge _0808F5FC
-_0808F5F8:
-	movs r0, 0
-	b _0808F5FE
-_0808F5FC:
-	movs r0, 0x1
-_0808F5FE:
-	add sp, 0x4
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	thumb_func_end FieldObjectIsTrainerAndCloseToPlayer
-
 	thumb_func_start sub_808F608
 sub_808F608: @ 808F608
 	push {r4,lr}
diff --git a/include/field_player_avatar.h b/include/field_player_avatar.h
index 5e2f0822c..3a74b3b10 100644
--- a/include/field_player_avatar.h
+++ b/include/field_player_avatar.h
@@ -8,5 +8,7 @@
 void ClearPlayerAvatarInfo(void);
 void SetPlayerAvatarExtraStateTransition(u8, u8);
 u8 GetPlayerAvatarGenderByGraphicsId(u8);
+bool8 TestPlayerAvatarFlags(u8);
+void PlayerGetDestCoords(s16 *, s16 *);
 
 #endif //POKEEMERALD_FIELD_PLAYER_AVATAR_H
diff --git a/src/field_map_obj.c b/src/field_map_obj.c
index 90b2f0302..f86e544a8 100755
--- a/src/field_map_obj.c
+++ b/src/field_map_obj.c
@@ -1799,3 +1799,36 @@ bool8 sub_808F564(struct MapObject *mapObject, struct Sprite *sprite)
     }
     return FALSE;
 }
+
+bool8 FieldObjectIsTrainerAndCloseToPlayer(struct MapObject *mapObject)
+{
+    s16 playerX;
+    s16 playerY;
+    s16 objX;
+    s16 objY;
+    s16 minX;
+    s16 maxX;
+    s16 minY;
+    s16 maxY;
+
+    if (!TestPlayerAvatarFlags(0x80))
+    {
+        return FALSE;
+    }
+    if (mapObject->trainerType != 1 && mapObject->trainerType != 3)
+    {
+        return FALSE;
+    }
+    PlayerGetDestCoords(&playerX, &playerY);
+    objX = mapObject->coords2.x;
+    objY = mapObject->coords2.y;
+    minX = objX - mapObject->trainerRange_berryTreeId;
+    minY = objY - mapObject->trainerRange_berryTreeId;
+    maxX = objX + mapObject->trainerRange_berryTreeId;
+    maxY = objY + mapObject->trainerRange_berryTreeId;
+    if (minX > playerX || maxX < playerX || minY > playerY || maxY < playerY)
+    {
+        return FALSE;
+    }
+    return TRUE;
+}