Implemented Supreme Overlord's effect

data/battle_scripts_1.s

@@ -8444,6 +8444,13 @@ BattleScript_RuinAbilityActivates::
 	waitmessage B_WAIT_TIME_LONG
 	end3
 
+BattleScript_SupremeOverlordActivates::
+	pause B_WAIT_TIME_SHORT
+	call BattleScript_AbilityPopUp
+	printstring STRINGID_ATTACKERGAINEDSTRENGTHFROMTHEFALLEN
+	waitmessage B_WAIT_TIME_LONG
+	end3
+
 BattleScript_AttackWeakenedByStrongWinds::
 	pause B_WAIT_TIME_SHORT
 	printstring STRINGID_ATTACKWEAKENEDBSTRONGWINDS

include/battle_scripts.h

@@ -445,6 +445,7 @@ extern const u8 BattleScript_QuarkDriveActivates[];
 extern const u8 BattleScript_GoodAsGoldActivates[];
 extern const u8 BattleScript_RuinAbilityActivates[];
 extern const u8 BattleScript_CudChewActivates[];
+extern const u8 BattleScript_SupremeOverlordActivates[];
 
 // zmoves
 extern const u8 BattleScript_ZMoveActivateDamaging[];

include/constants/battle_string_ids.h

@@ -635,8 +635,9 @@
 #define STRINGID_STATWASHEIGHTENED                    633
 #define STRINGID_ELECTRICTERRAINACTIVATEDABILITY      634
 #define STRINGID_ABILITYWEAKENEDFSURROUNDINGMONSSTAT  635
+#define STRINGID_ATTACKERGAINEDSTRENGTHFROMTHEFALLEN  636
 
-#define BATTLESTRINGS_COUNT                           636
+#define BATTLESTRINGS_COUNT                           637
 
 // This is the string id that gBattleStringsTable starts with.
 // String ids before this (e.g. STRINGID_INTROMSG) are not in the table,

src/battle_message.c

@@ -764,9 +764,11 @@ static const u8 sText_SunlightActivatedAbility[] = _("The harsh sunlight activat
 static const u8 sText_StatWasHeightened[] = _("{B_ATK_NAME_WITH_PREFIX}'s {B_BUFF1} was heightened!");
 static const u8 sText_ElectricTerrainActivatedAbility[] = _("The Electric Terrain activated\n{B_ATK_NAME_WITH_PREFIX}'s {B_ATK_ABILITY}!");
 static const u8 sText_AbilityWeakenedSurroundingMonsStat[] = _("{B_ATK_NAME_WITH_PREFIX}'s {B_ATK_ABILITY}\nweakened the {B_BUFF1} of\lall surrounding Pokémon!\p");
+static const u8 sText_AttackerGainedStrengthFromTheFallen[] = _("{B_ATK_NAME_WITH_PREFIX} gained strength\nfrom the fallen!");
 
 const u8 *const gBattleStringsTable[BATTLESTRINGS_COUNT] =
 {
+    [STRINGID_ATTACKERGAINEDSTRENGTHFROMTHEFALLEN - BATTLESTRINGS_TABLE_START] = sText_AttackerGainedStrengthFromTheFallen,
     [STRINGID_ABILITYWEAKENEDFSURROUNDINGMONSSTAT - BATTLESTRINGS_TABLE_START] = sText_AbilityWeakenedSurroundingMonsStat,
     [STRINGID_ELECTRICTERRAINACTIVATEDABILITY - BATTLESTRINGS_TABLE_START] = sText_ElectricTerrainActivatedAbility,
     [STRINGID_STATWASHEIGHTENED - BATTLESTRINGS_TABLE_START] = sText_StatWasHeightened,

src/battle_util.c

@@ -4957,6 +4957,14 @@ u8 AbilityBattleEffects(u8 caseID, u8 battler, u16 ability, u8 special, u16 move
                 effect++;
             }
             break;
+        case ABILITY_SUPREME_OVERLORD:
+            if (!gSpecialStatuses[battler].switchInAbilityDone && CountUsablePartyMons(battler) < PARTY_SIZE)
+            {
+                gSpecialStatuses[battler].switchInAbilityDone = TRUE;
+                BattleScriptPushCursorAndCallback(BattleScript_SupremeOverlordActivates);
+                effect++;
+            }
+            break;
 #if B_WEATHER_FORMS < GEN_5
         default:
             if (gBattleMons[battler].species == SPECIES_CHERRIM)
@@ -8722,6 +8730,26 @@ static u16 CalcMoveBasePower(u16 move, u8 battlerAtk, u8 battlerDef)
     return basePower;
 }
 
+// Supreme Overlord adds a damage boost for each fainted ally.
+// The first ally adds a x1.2 boost, and subsequent allies add an extra x0.1 boost each.
+static u16 ApplySupremeOverlordModifier(u8 battlerId)
+{
+    u8 side = GetBattlerSide(battlerId);
+    struct Pokemon *party = (side == B_SIDE_PLAYER) ? gPlayerParty : gEnemyParty;
+    u8 i;
+    u16 modifier = UQ_4_12(1.0);
+    bool8 appliedFirstBoost = FALSE;
+
+    for (i = 0; i < PARTY_SIZE; i++)
+    {
+        if (GetMonData(&party[i], MON_DATA_HP) == 0)
+            modifier += (!appliedFirstBoost) ? UQ_4_12(0.2) : UQ_4_12(0.1);
+        appliedFirstBoost = TRUE;
+    }
+
+    return modifier;
+}
+
 static u32 CalcMoveBasePowerAfterModifiers(u16 move, u8 battlerAtk, u8 battlerDef, u8 moveType, bool32 updateFlags)
 {
     u32 i;
@@ -8866,6 +8894,9 @@ static u32 CalcMoveBasePowerAfterModifiers(u16 move, u8 battlerAtk, u8 battlerDe
         if (gBattleMoves[move].flags & FLAG_SLICING_MOVE)
            MulModifier(&modifier, UQ_4_12(1.5));
         break;
+    case ABILITY_SUPREME_OVERLORD:
+        MulModifier(&modifier, ApplySupremeOverlordModifier(battlerAtk));
+        break;
     }
 
     // field abilities