add AI_MoveMakesContact, dissuade multi-hit attacks against rocky helmet

include/battle_ai_util.h

@@ -58,6 +58,7 @@ bool32 CanKnockOffItem(u8 battler, u16 item);
 bool32 IsAbilityOfRating(u16 ability, s8 rating);
 s8 GetAbilityRating(u16 ability);
 bool32 AI_IsAbilityOnSide(u32 battlerId, u32 ability);
+bool32 AI_MoveMakesContact(u32 ability, u32 holdEffect, u16 move);
 
 // stat stage checks
 bool32 AnyStatIsRaised(u8 battlerId);

src/battle_ai_main.c

@@ -3246,6 +3246,9 @@ static s16 AI_CheckViability(u8 battlerAtk, u8 battlerDef, u16 move, s16 score)
     case EFFECT_MULTI_HIT:
     case EFFECT_DOUBLE_HIT:
     case EFFECT_TRIPLE_KICK:
+        if (AI_MoveMakesContact(AI_DATA->atkAbility, AI_DATA->atkHoldEffect, move)
+          && AI_DATA->defHoldEffect == HOLD_EFFECT_ROCKY_HELMET)
+            score -= 2;
         break;
     case EFFECT_CONVERSION:
         if (!IS_BATTLER_OF_TYPE(battlerAtk, gBattleMoves[gBattleMons[battlerAtk].moves[0]].type))

src/battle_ai_util.c

@@ -3598,3 +3598,12 @@ void IncreaseConfusionScore(u8 battlerAtk, u8 battlerDef, u16 move, s16 *score)
             *score += 2;
     }
 }
+
+bool32 AI_MoveMakesContact(u32 ability, u32 holdEffect, u16 move)
+{
+    if (TestMoveFlags(move, FLAG_MAKES_CONTACT)
+      && ability != ABILITY_LONG_REACH
+      && holdEffect != HOLD_EFFECT_PROTECTIVE_PADS)
+        return TRUE;
+    return FALSE;
+}