Frostbite hurts at the end of the turn and halves SpA

data/battle_scripts_1.s

@@ -8121,6 +8121,11 @@ BattleScript_BurnTurnDmg::
 	waitmessage B_WAIT_TIME_LONG
 	goto BattleScript_DoStatusTurnDmg
 
+BattleScript_FrostbiteTurnDmg::
+	printstring STRINGID_PKMNHURTBYFROSTBITE
+	waitmessage B_WAIT_TIME_LONG
+	goto BattleScript_DoStatusTurnDmg
+
 BattleScript_MoveUsedIsFrozen::
 	printstring STRINGID_PKMNISFROZEN
 	waitmessage B_WAIT_TIME_LONG

include/battle_scripts.h

@@ -108,6 +108,7 @@ extern const u8 BattleScript_MoveUsedWokeUp[];
 extern const u8 BattleScript_MonWokeUpInUproar[];
 extern const u8 BattleScript_PoisonTurnDmg[];
 extern const u8 BattleScript_BurnTurnDmg[];
+extern const u8 BattleScript_FrostbiteTurnDmg[];
 extern const u8 BattleScript_MoveUsedIsFrozen[];
 extern const u8 BattleScript_MoveUsedUnfroze[];
 extern const u8 BattleScript_DefrostedViaFireMove[];

include/constants/battle_string_ids.h

@@ -651,8 +651,9 @@
 #define STRINGID_ITEMRESTOREDSPECIESHEALTH            649
 #define STRINGID_ITEMCUREDSPECIESSTATUS               650
 #define STRINGID_ITEMRESTOREDSPECIESPP                651
+#define STRINGID_PKMNHURTBYFROSTBITE                  652
 
-#define BATTLESTRINGS_COUNT                           652
+#define BATTLESTRINGS_COUNT                           653
 
 // This is the string id that gBattleStringsTable starts with.
 // String ids before this (e.g. STRINGID_INTROMSG) are not in the table,

src/battle_gfx_sfx_util.c

@@ -398,7 +398,7 @@ void InitAndLaunchChosenStatusAnimation(bool8 isStatus2, u32 status)
     gBattleSpritesDataPtr->healthBoxesData[gActiveBattler].statusAnimActive = 1;
     if (!isStatus2)
     {
-        if (status == STATUS1_FREEZE)
+        if (status == STATUS1_FREEZE || status == STATUS1_FROSTBITE)
             LaunchStatusAnimation(gActiveBattler, B_ANIM_STATUS_FRZ);
         else if (status == STATUS1_POISON || status & STATUS1_TOXIC_POISON)
             LaunchStatusAnimation(gActiveBattler, B_ANIM_STATUS_PSN);

src/battle_message.c

@@ -103,6 +103,7 @@ static const u8 sText_PkmnEnergyDrained[] = _("{B_DEF_NAME_WITH_PREFIX} had its\
 static const u8 sText_PkmnWasBurned[] = _("{B_EFF_NAME_WITH_PREFIX} was burned!");
 static const u8 sText_PkmnBurnedBy[] = _("{B_SCR_ACTIVE_NAME_WITH_PREFIX}'s {B_SCR_ACTIVE_ABILITY}\nburned {B_EFF_NAME_WITH_PREFIX}!");
 static const u8 sText_PkmnHurtByBurn[] = _("{B_ATK_NAME_WITH_PREFIX} is hurt\nby its burn!");
+static const u8 sText_PkmnHurtByFrostbite[] = _("{B_ATK_NAME_WITH_PREFIX} is hurt\nby its frostbite!");
 static const u8 sText_PkmnAlreadyHasBurn[] = _("{B_DEF_NAME_WITH_PREFIX} already\nhas a burn.");
 static const u8 sText_PkmnWasFrozen[] = _("{B_EFF_NAME_WITH_PREFIX} was\nfrozen solid!");
 static const u8 sText_PkmnFrozenBy[] = _("{B_SCR_ACTIVE_NAME_WITH_PREFIX}'s {B_SCR_ACTIVE_ABILITY}\nfroze {B_EFF_NAME_WITH_PREFIX} solid!");
@@ -1428,6 +1429,7 @@ const u8 *const gBattleStringsTable[BATTLESTRINGS_COUNT] =
     [STRINGID_TARGETTOOHEAVY - BATTLESTRINGS_TABLE_START] = sText_TargetTooHeavy,
     [STRINGID_ATTACKERLOSTELECTRICTYPE - BATTLESTRINGS_TABLE_START] = sText_AttackerLostElectricType,
     [STRINGID_PKMNSABILITYPREVENTSABILITY - BATTLESTRINGS_TABLE_START] = sText_PkmnsAbilityPreventsAbility,
+    [STRINGID_PKMNHURTBYFROSTBITE - BATTLESTRINGS_TABLE_START] = sText_PkmnHurtByFrostbite,
 };
 
 const u16 gTrainerUsedItemStringIds[] =

src/battle_util.c

@@ -2523,6 +2523,7 @@ enum
     ENDTURN_POISON,
     ENDTURN_BAD_POISON,
     ENDTURN_BURN,
+    ENDTURN_FROSTBITE,
     ENDTURN_NIGHTMARES,
     ENDTURN_CURSE,
     ENDTURN_WRAP,
@@ -2736,6 +2737,23 @@ u8 DoBattlerEndTurnEffects(void)
             }
             gBattleStruct->turnEffectsTracker++;
             break;
+        case ENDTURN_FROSTBITE:  // burn
+            if ((gBattleMons[gActiveBattler].status1 & STATUS1_FROSTBITE)
+                && gBattleMons[gActiveBattler].hp != 0)
+            {
+                MAGIC_GUARD_CHECK;
+            #if B_BURN_DAMAGE >= GEN_7
+                gBattleMoveDamage = gBattleMons[gActiveBattler].maxHP / 16;
+            #else
+                gBattleMoveDamage = gBattleMons[gActiveBattler].maxHP / 8;
+            #endif
+                if (gBattleMoveDamage == 0)
+                    gBattleMoveDamage = 1;
+                BattleScriptExecute(BattleScript_FrostbiteTurnDmg);
+                effect++;
+            }
+            gBattleStruct->turnEffectsTracker++;
+            break;
         case ENDTURN_NIGHTMARES:  // spooky nightmares
             if ((gBattleMons[gActiveBattler].status2 & STATUS2_NIGHTMARE)
                 && gBattleMons[gActiveBattler].hp != 0)
@@ -9508,6 +9526,14 @@ static u32 CalcFinalDmg(u32 dmg, u16 move, u8 battlerAtk, u8 battlerDef, u8 move
         && abilityAtk != ABILITY_GUTS)
         dmg = ApplyModifier(UQ_4_12(0.5), dmg);
 
+    // check frostbite
+    if (gBattleMons[battlerAtk].status1 & STATUS1_FROSTBITE && !IS_MOVE_PHYSICAL(move)
+    #if B_BURN_FACADE_DMG >= GEN_6
+        && gBattleMoves[move].effect != EFFECT_FACADE
+    #endif
+        && abilityAtk != ABILITY_GUTS)
+        dmg = ApplyModifier(UQ_4_12(0.5), dmg);
+
     // check sunny/rain weather
     if (IsBattlerWeatherAffected(battlerAtk, B_WEATHER_RAIN))
     {