add config option

include/constants/battle_config.h

@@ -127,6 +127,7 @@
 #define B_HP_BERRIES                GEN_6 // In Gen4+, berries which restore hp activate immediately after hp drops to half. In gen3, the effect occurs at the end of the turn.
 #define B_BERRIES_INSTANT           GEN_6 // In Gen4+, most berries activate on battle start/switch-in if applicable. In gen3, they only activate either at the move end or turn end.
 #define B_X_ITEMS_BUFF              GEN_7 // In Gen7+, the X Items raise a stat by 2 stages instead of 1.
+#define B_MENTAL_HERB               GEN_5 // In Gen5+, the Mental Herb cures Infatuation, Taunt, Encore, Torment, Heal Block, and Disable
 
 // Flag settings
 // To use the following features in scripting, replace the 0s with the flag ID you're assigning it to.

src/battle_util.c

@@ -5213,6 +5213,7 @@ static bool32 GetMentalHerbEffect(u8 battlerId)
         StringCopy(gBattleTextBuff1, gStatusConditionString_LoveJpn);
         ret = TRUE;
     }
+    #if B_MENTAL_HERB >= GEN_5
         // check taunt
         if (gDisableStructs[gBattlerTarget].tauntTimer != 0)
         {
@@ -5251,6 +5252,7 @@ static bool32 GetMentalHerbEffect(u8 battlerId)
             gBattleCommunication[MULTISTRING_CHOOSER] = MULTI_CUREDISABLE;
             ret = TRUE;
         }
+    #endif
     return ret;
 }