diff --git a/include/battle_script_commands.h b/include/battle_script_commands.h
index dec1596f21..b55ac1391d 100644
--- a/include/battle_script_commands.h
+++ b/include/battle_script_commands.h
@@ -37,6 +37,7 @@ bool32 TryResetBattlerStatChanges(u8 battler);
 bool32 CanCamouflage(u8 battlerId);
 u16 GetNaturePowerMove(void);
 void StealTargetItem(u8 battlerStealer, u8 battlerItem);
+u8 GetCatchingBattler(void);
 
 extern void (* const gBattleScriptingCommandsTable[])(void);
 extern const u8 gBattlePalaceNatureToMoveGroupLikelihood[NUM_NATURES][4];
diff --git a/include/constants/battle_config.h b/include/constants/battle_config.h
index bce49719ee..fc9bc9f4e9 100644
--- a/include/constants/battle_config.h
+++ b/include/constants/battle_config.h
@@ -178,6 +178,7 @@
 #define B_POWDER_GRASS              GEN_7 // In Gen6+, Grass-type Pokémon are immune to powder and spore moves.
 #define B_STEEL_RESISTANCES         GEN_7 // In Gen6+, Steel-type Pokémon are no longer resistant to Dark-type and Ghost-type moves.
 #define B_THUNDERSTORM_TERRAIN      TRUE  // If TRUE, overworld Thunderstorm generates Rain and Electric Terrain as in Gen 8.
+#define B_SEMI_INVULNERABLE_CATCH   GEN_7 // In Gen4+, you cannot throw a ball against a Pokemon that is in a semi-invulnerable state (dig/fly/etc)
 
 // Animation Settings
 #define B_NEW_SWORD_PARTICLE            FALSE    // If set to TRUE, it updates Swords Dance's particle.
diff --git a/src/battle_script_commands.c b/src/battle_script_commands.c
index 29614e09b4..2c0614ada5 100644
--- a/src/battle_script_commands.c
+++ b/src/battle_script_commands.c
@@ -12565,7 +12565,7 @@ static void Cmd_removelightscreenreflect(void) // brick break
     gBattlescriptCurrInstr++;
 }
 
-static u8 GetCatchingBattler(void)
+u8 GetCatchingBattler(void)
 {
     if (IsBattlerAlive(GetBattlerAtPosition(B_POSITION_OPPONENT_LEFT)))
         return GetBattlerAtPosition(B_POSITION_OPPONENT_LEFT);
diff --git a/src/item_use.c b/src/item_use.c
index 63854a1ac1..9a1fd2478a 100755
--- a/src/item_use.c
+++ b/src/item_use.c
@@ -947,11 +947,18 @@ u32 CanThrowBall(void)
     {
         return 2;   // No room for mon
     }
+    #if B_SEMI_INVULNERABLE_CATCH >= GEN_4
+    else if (gStatuses3[GetCatchingBattler()] & STATUS3_SEMI_INVULNERABLE)
+    {
+        return 3;   // in semi-invulnerable state
+    }
+    #endif
     
     return 0;   // usable 
 }
 
-static const u8 sText_CantThrowPokeBall_TwoMons[] = _("Cannot throw a ball!\nThere are two pokemon out there!\p");
+static const u8 sText_CantThrowPokeBall_TwoMons[] = _("Cannot throw a ball!\nThere are two Pokémon out there!\p");
+static const u8 sText_CantThrowPokeBall_SemiInvulnerable[] = _("Cannot throw a ball!\nThere's no Pokémon in sight!\p");
 void ItemUseInBattle_PokeBall(u8 taskId)
 {
     switch (CanThrowBall())
@@ -976,6 +983,14 @@ void ItemUseInBattle_PokeBall(u8 taskId)
         else
             DisplayItemMessageInBattlePyramid(taskId, gText_BoxFull, Task_CloseBattlePyramidBagMessage);
         break;
+    #if B_SEMI_INVULNERABLE_CATCH >= GEN_4
+    case 3: // Semi-Invulnerable
+        if (!InBattlePyramid())
+            DisplayItemMessage(taskId, 1, sText_CantThrowPokeBall_SemiInvulnerable, CloseItemMessage);
+        else
+            DisplayItemMessageInBattlePyramid(taskId, sText_CantThrowPokeBall_SemiInvulnerable, Task_CloseBattlePyramidBagMessage);
+        break;
+    #endif
     }
 }