Adds Mortal Spin and Population Bomb

data/battle_scripts_1.s

@@ -435,6 +435,17 @@ gBattleScriptsForMoveEffects::
 	.4byte BattleScript_EffectHit                     @ EFFECT_COLLISION_COURSE
 	.4byte BattleScript_EffectSpinOut                 @ EFFECT_SPIN_OUT
 	.4byte BattleScript_EffectMakeItRain              @ EFFECT_MAKE_IT_RAIN
+	.4byte BattleScript_EffectHit                     @ EFFECT_POPULATION_BOMB
+	.4byte BattleScript_EffectMortalSpin              @ EFFECT_MORTAL_SPIN
+
+BattleScript_EffectMortalSpin:
+	call BattleScript_EffectHit_Ret
+	rapidspinfree
+	setmoveeffect MOVE_EFFECT_POISON
+	seteffectwithchance
+	tryfaintmon BS_TARGET
+	moveendall
+	end
 
 BattleScript_EffectMakeItRain:
 	setmoveeffect MOVE_EFFECT_PAYDAY

include/constants/battle_move_effects.h

@@ -412,7 +412,9 @@
 #define EFFECT_COLLISION_COURSE             406
 #define EFFECT_SPIN_OUT                     407
 #define EFFECT_MAKE_IT_RAIN                 408
+#define EFFECT_POPULATION_BOMB              409
+#define EFFECT_MORTAL_SPIN                  410
 
-#define NUM_BATTLE_MOVE_EFFECTS             409
+#define NUM_BATTLE_MOVE_EFFECTS             411
 
 #endif  // GUARD_CONSTANTS_BATTLE_MOVE_EFFECTS_H

src/battle_ai_main.c

@@ -3571,6 +3571,7 @@ static s16 AI_CheckViability(u8 battlerAtk, u8 battlerDef, u16 move, s16 score)
     case EFFECT_TOXIC:
     case EFFECT_POISON:
     case EFFECT_BARB_BARRAGE:
+    case EFFECT_MORTAL_SPIN:
         IncreasePoisonScore(battlerAtk, battlerDef, move, &score);
         break;
     case EFFECT_LIGHT_SCREEN:
@@ -4246,6 +4247,7 @@ static s16 AI_CheckViability(u8 battlerAtk, u8 battlerDef, u16 move, s16 score)
             }
             break;
         case MOVE_RAPID_SPIN:
+        case MOVE_MORTAL_SPIN:
             if (gStatuses3[battlerAtk] & STATUS3_LEECHSEED || gBattleMons[battlerAtk].status2 & STATUS2_WRAPPED)
                 score += 3;
             break;

src/battle_ai_util.c

@@ -865,7 +865,7 @@ s32 AI_CalcDamage(u16 move, u8 battlerAtk, u8 battlerDef, u8 *typeEffectiveness,
             }
 
             // Handle other multi-strike moves
-            if (gBattleMoves[move].strikeCount > 1)
+            if (gBattleMoves[move].strikeCount > 1 && gBattleMoves[move].effect != EFFECT_TRIPLE_KICK)
                 dmg *= gBattleMoves[move].strikeCount;
             else if (move == MOVE_WATER_SHURIKEN && gBattleMons[battlerAtk].species == SPECIES_GRENINJA_ASH)
                 dmg *= 3;

src/battle_script_commands.c

@@ -1722,10 +1722,10 @@ static void Cmd_accuracycheck(void)
             gBattlescriptCurrInstr = cmd->nextInstr;
     }
     else if (gSpecialStatuses[gBattlerAttacker].parentalBondState == PARENTAL_BOND_2ND_HIT
-        || (gSpecialStatuses[gBattlerAttacker].multiHitOn && (gBattleMoves[move].effect != EFFECT_TRIPLE_KICK
+        || (gSpecialStatuses[gBattlerAttacker].multiHitOn && (GetBattlerAbility(gBattlerAttacker) == ABILITY_SKILL_LINK
-        || GetBattlerAbility(gBattlerAttacker) == ABILITY_SKILL_LINK)))
+        || !(gBattleMoves[move].effect == EFFECT_TRIPLE_KICK || gBattleMoves[move].effect == EFFECT_POPULATION_BOMB))))
     {
-        // No acc checks for second hit of Parental Bond or multi hit moves, except Triple Kick/Triple Axel
+        // No acc checks for second hit of Parental Bond or multi hit moves, except Triple Kick/Triple Axel/Population Bomb
         gBattlescriptCurrInstr = cmd->nextInstr;
     }
     else

src/battle_util.c

@@ -3748,11 +3748,6 @@ u8 AtkCanceller_UnableToUseMove(void)
                 gMultiHitCounter = gBattleMoves[gCurrentMove].strikeCount;
                 PREPARE_BYTE_NUMBER_BUFFER(gBattleScripting.multihitString, 3, 0)
             }
-            else if (gBattleMoves[gCurrentMove].effect == EFFECT_TRIPLE_KICK)
-            {
-                gMultiHitCounter = 3;
-                PREPARE_BYTE_NUMBER_BUFFER(gBattleScripting.multihitString, 1, 0)
-            }
         #if B_BEAT_UP >= GEN_5
             else if (gBattleMoves[gCurrentMove].effect == EFFECT_BEAT_UP)
             {

src/data/battle_moves.h

@@ -2886,6 +2886,7 @@ const struct BattleMove gBattleMoves[MOVES_COUNT_Z] =
         .split = SPLIT_PHYSICAL,
         .zMoveEffect = Z_EFFECT_NONE,
         .makesContact = TRUE,
+        .strikeCount = 3,
     },
 
     [MOVE_THIEF] =
@@ -12357,6 +12358,7 @@ const struct BattleMove gBattleMoves[MOVES_COUNT_Z] =
         .split = SPLIT_PHYSICAL,
         .zMoveEffect = Z_EFFECT_NONE,
         .makesContact = TRUE,
+        .strikeCount = 3,
     },
 
     [MOVE_DUAL_WINGBEAT] =
@@ -13152,7 +13154,7 @@ const struct BattleMove gBattleMoves[MOVES_COUNT_Z] =
 
     [MOVE_POPULATION_BOMB] =
     {
-        .effect = EFFECT_PLACEHOLDER, // EFFECT_MULTI_HIT maybe?
+        .effect = EFFECT_POPULATION_BOMB,
         .power = 20,
         .type = TYPE_NORMAL,
         .accuracy = 90,
@@ -13165,6 +13167,7 @@ const struct BattleMove gBattleMoves[MOVES_COUNT_Z] =
         .makesContact = TRUE,
         .slicingMove = TRUE,
         .metronomeBanned = TRUE,
+        .strikeCount = 10,
     },
 
     [MOVE_ICE_SPINNER] =
@@ -13246,12 +13249,12 @@ const struct BattleMove gBattleMoves[MOVES_COUNT_Z] =
 
     [MOVE_MORTAL_SPIN] =
     {
-        .effect = EFFECT_PLACEHOLDER, // EFFECT_MORTAL_SPIN
+        .effect = EFFECT_MORTAL_SPIN,
         .power = 30,
         .type = TYPE_POISON,
         .accuracy = 100,
         .pp = 15,
-        .secondaryEffectChance = 0,
+        .secondaryEffectChance = 100,
         .target = MOVE_TARGET_BOTH,
         .priority = 0,
         .split = SPLIT_PHYSICAL,

test/move_effect_mortal_spin.c

@@ -0,0 +1,24 @@
+#include "global.h"
+#include "test_battle.h"
+
+ASSUMPTIONS
+{
+    ASSUME(gBattleMoves[MOVE_MORTAL_SPIN].effect == EFFECT_MORTAL_SPIN);
+}
+
+SINGLE_BATTLE_TEST("Mortal Spin blows away hazards and poisons foe")
+{
+    GIVEN {
+        PLAYER(SPECIES_WOBBUFFET);
+        OPPONENT(SPECIES_WOBBUFFET);
+    } WHEN {
+        TURN { MOVE(opponent, MOVE_STEALTH_ROCK); MOVE(player, MOVE_MORTAL_SPIN); }
+    } SCENE {
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_STEALTH_ROCK, opponent);
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_MORTAL_SPIN, player);
+        MESSAGE("Wobbuffet blew away Stealth Rock!");
+        MESSAGE("Foe Wobbuffet was poisoned!");
+        STATUS_ICON(opponent, poison: TRUE);
+    }
+}
+