From 9f83c9b5740ce3b198e20d3e0c8871915ae49647 Mon Sep 17 00:00:00 2001
From: LOuroboros <lunosouroboros@gmail.com>
Date: Sat, 3 Apr 2021 21:55:49 -0300
Subject: [PATCH] Implemented Stench's battle effect And updated its
 description.

---
 src/battle_util.c         | 52 +++++++++++++++++++++++++++++++++++++++
 src/data/text/abilities.h |  2 +-
 2 files changed, 53 insertions(+), 1 deletion(-)

diff --git a/src/battle_util.c b/src/battle_util.c
index f1f5ffd10..9d910692e 100644
--- a/src/battle_util.c
+++ b/src/battle_util.c
@@ -706,6 +706,43 @@ void HandleAction_ActionFinished(void)
 
 // rom const data
 
+static const u8 sMovesNotAffectedByStench[] =
+{
+    [MOVE_AIR_SLASH] = 1,
+    [MOVE_ASTONISH] = 1,
+    [MOVE_BITE] = 1,
+    [MOVE_BONE_CLUB] = 1,
+    [MOVE_DARK_PULSE] = 1,
+    [MOVE_DOUBLE_IRON_BASH] = 1,
+    [MOVE_DRAGON_RUSH] = 1,
+    [MOVE_EXTRASENSORY] = 1,
+    [MOVE_FAKE_OUT] = 1,
+    [MOVE_FIERY_WRATH] = 1,
+    [MOVE_FIRE_FANG] = 1,
+    [MOVE_FLING] = 1,
+    [MOVE_FLOATY_FALL] = 1,
+    [MOVE_HEADBUTT] = 1,
+    [MOVE_HEART_STAMP] = 1,
+    [MOVE_HYPER_FANG] = 1,
+    [MOVE_ICE_FANG] = 1,
+    [MOVE_ICICLE_CRASH] = 1,
+    [MOVE_IRON_HEAD] = 1,
+    [MOVE_NEEDLE_ARM] = 1,
+    [MOVE_NONE] = 1,
+    [MOVE_ROCK_SLIDE] = 1,
+    [MOVE_ROLLING_KICK] = 1,
+    [MOVE_SECRET_POWER] = 1,
+    [MOVE_SKY_ATTACK] = 1,
+    [MOVE_SNORE] = 1,
+    [MOVE_STEAMROLLER] = 1,
+    [MOVE_STOMP] = 1,
+    [MOVE_THUNDER_FANG] = 1,
+    [MOVE_TWISTER] = 1,
+    [MOVE_WATERFALL] = 1,
+    [MOVE_ZEN_HEADBUTT] = 1,
+    [MOVE_ZING_ZAP] = 1,
+};
+
 static const u8 sAbilitiesAffectedByMoldBreaker[] =
 {
     [ABILITY_BATTLE_ARMOR] = 1,
@@ -4807,6 +4844,21 @@ u8 AbilityBattleEffects(u8 caseID, u8 battler, u16 ability, u8 special, u16 move
                 effect++;
             }
             break;
+        case ABILITY_STENCH:
+            if (!(gMoveResultFlags & MOVE_RESULT_NO_EFFECT)
+             && gBattleMons[gBattlerTarget].hp != 0
+             && !gProtectStructs[gBattlerAttacker].confusionSelfDmg
+             && (Random() % 10) == 0
+             && !IS_MOVE_STATUS(move)
+             && !sMovesNotAffectedByStench[gCurrentMove])
+            {
+                gBattleScripting.moveEffect = MOVE_EFFECT_FLINCH;
+                BattleScriptPushCursor();
+                SetMoveEffect(FALSE, 0);
+                BattleScriptPop();
+                effect++;
+            }
+            break;
         }
         break;
     case ABILITYEFFECT_MOVE_END_OTHER: // Abilities that activate on *another* battler's moveend: Dancer, Soul-Heart, Receiver, Symbiosis
diff --git a/src/data/text/abilities.h b/src/data/text/abilities.h
index fdecea8a8..a9f8ba7ab 100644
--- a/src/data/text/abilities.h
+++ b/src/data/text/abilities.h
@@ -1,5 +1,5 @@
 static const u8 sNoneDescription[] = _("No special ability.");
-static const u8 sStenchDescription[] = _("Helps repel wild POKéMON.");
+static const u8 sStenchDescription[] = _("May cause a foe to flinch.");
 static const u8 sDrizzleDescription[] = _("Summons rain in battle.");
 static const u8 sSpeedBoostDescription[] = _("Gradually boosts Speed.");
 static const u8 sBattleArmorDescription[] = _("Blocks critical hits.");