diff --git a/include/wild_encounter.h b/include/wild_encounter.h
index a729f9aa6d..ed5176af3c 100644
--- a/include/wild_encounter.h
+++ b/include/wild_encounter.h
@@ -42,5 +42,6 @@ u16 GetCurrentMapWildMonHeaderId(void);
 u8 ChooseWildMonIndex_Land(void);
 u8 ChooseWildMonIndex_WaterRock(void);
 u8 ChooseHiddenMonIndex(void);
+bool32 MapHasNoEncounterData(void);
 
 #endif // GUARD_WILD_ENCOUNTER_H
diff --git a/src/start_menu.c b/src/start_menu.c
index 6f2ab02f6d..8cd7a24bc3 100644
--- a/src/start_menu.c
+++ b/src/start_menu.c
@@ -44,6 +44,7 @@
 #include "window.h"
 #include "union_room.h"
 #include "dexnav.h"
+#include "wild_encounter.h"
 #include "constants/battle_frontier.h"
 #include "constants/rgb.h"
 #include "constants/songs.h"
@@ -171,8 +172,8 @@ static const struct MenuAction sStartMenuItems[] =
     [MENU_ACTION_PLAYER_LINK]     = {gText_MenuPlayer,  {.u8_void = StartMenuLinkModePlayerNameCallback}},
     [MENU_ACTION_REST_FRONTIER]   = {gText_MenuRest,    {.u8_void = StartMenuSaveCallback}},
     [MENU_ACTION_RETIRE_FRONTIER] = {gText_MenuRetire,  {.u8_void = StartMenuBattlePyramidRetireCallback}},
-    [MENU_ACTION_PYRAMID_BAG]     = {gText_MenuBag,     {.u8_void = StartMenuBattlePyramidBagCallback}}
-    [MENU_ACTION_DEXNAV]          = {gText_MenuDexNav, {.u8_void = StartMenuDexNavCallback}}
+    [MENU_ACTION_PYRAMID_BAG]     = {gText_MenuBag,     {.u8_void = StartMenuBattlePyramidBagCallback}},
+    [MENU_ACTION_DEXNAV]          = {gText_MenuDexNav,  {.u8_void = StartMenuDexNavCallback}},
 };
 
 static const struct BgTemplate sBgTemplates_LinkBattleSave[] =
@@ -589,6 +590,10 @@ static bool8 HandleStartMenuInput(void)
             if (GetNationalPokedexCount(FLAG_GET_SEEN) == 0)
                 return FALSE;
         }
+        if (sCurrentStartMenuActions[sStartMenuCursorPos] == MENU_ACTION_DEXNAV
+          && MapHasNoEncounterData())
+            return FALSE;
+        
         gMenuCallback = sStartMenuItems[sCurrentStartMenuActions[sStartMenuCursorPos]].func.u8_void;
 
         if (gMenuCallback != StartMenuSaveCallback
diff --git a/src/wild_encounter.c b/src/wild_encounter.c
index 954ad92874..5a42027fa9 100644
--- a/src/wild_encounter.c
+++ b/src/wild_encounter.c
@@ -963,3 +963,13 @@ u8 ChooseHiddenMonIndex(void)
     #endif
 }
 
+bool32 MapHasNoEncounterData(void)
+{
+    u16 headerId = GetCurrentMapWildMonHeaderId();
+    const struct WildPokemonInfo *landMonsInfo = gWildMonHeaders[headerId].landMonsInfo;
+    const struct WildPokemonInfo *waterMonsInfo = gWildMonHeaders[headerId].waterMonsInfo;
+    const struct WildPokemonInfo *hiddenMonsInfo = gWildMonHeaders[headerId].hiddenMonsInfo;
+    
+    return (landMonsInfo == NULL && waterMonsInfo == NULL && hiddenMonsInfo == NULL);
+}
+