diff --git a/include/constants/battle_config.h b/include/constants/battle_config.h
index 6412129a09..ad36d189cd 100644
--- a/include/constants/battle_config.h
+++ b/include/constants/battle_config.h
@@ -130,8 +130,9 @@
 // Other
 #define B_DOUBLE_WILD_CHANCE        0     // % chance of encountering two Pokémon in a Wild Encounter.
 #define B_SLEEP_TURNS               GEN_6 // In Gen5+, sleep lasts for 1-3 turns instead of 2-5 turns.
-#define B_PARALYZE_ELECTRIC         GEN_6 // In Gen6+, Electric type Pokémon can't be paralyzed.
-#define B_POWDER_GRASS              GEN_6 // In Gen6+, Grass type Pokémon are immune to powder and spore moves.
+#define B_PARALYZE_ELECTRIC         GEN_6 // In Gen6+, Electric-type Pokémon can't be paralyzed.
+#define B_POWDER_GRASS              GEN_6 // In Gen6+, Grass-type Pokémon are immune to powder and spore moves.
+#define B_STEEL_RESISTANCES         GEN_6 // In Gen6+, Steel-type Pokémon are no longer resistant to Dark and Ghost moves.
 #define B_TRAINERS_STEAL_ITEMS      TRUE  // If TRUE, trainer with thief/pickpocket will temporarily steal your items
 
 // Animation Settings
diff --git a/include/constants/battle_move_effects.h b/include/constants/battle_move_effects.h
index abdd193771..b018429de4 100644
--- a/include/constants/battle_move_effects.h
+++ b/include/constants/battle_move_effects.h
@@ -302,55 +302,54 @@
 #define EFFECT_CLEAR_SMOG 296
 #define EFFECT_HIT_SWITCH_TARGET 297
 #define EFFECT_FINAL_GAMBIT 298
-#define EFFECT_TECHNO_BLAST 299
-#define EFFECT_JUDGMENT 300
-#define EFFECT_AUTOTOMIZE 301
-#define EFFECT_COPYCAT 302
-#define EFFECT_DEFOG 303
-#define EFFECT_HIT_ENEMY_HEAL_ALLY 304 // Pollen Puff
-#define EFFECT_SMACK_DOWN 305
-#define EFFECT_SYNCHRONOISE 306
-#define EFFECT_PSYCHO_SHIFT 307
-#define EFFECT_POWER_TRICK 308
-#define EFFECT_FLAME_BURST 309
-#define EFFECT_AFTER_YOU 310
-#define EFFECT_BESTOW 311
-#define EFFECT_ROTOTILLER 312
-#define EFFECT_FLOWER_SHIELD 313
-#define EFFECT_HIT_PREVENT_ESCAPE 314
-#define EFFECT_SPEED_SWAP 315
-#define EFFECT_DEFENSE_UP2_HIT 316
-#define EFFECT_REVELATION_DANCE 317
-#define EFFECT_AURORA_VEIL 318
-#define EFFECT_THIRD_TYPE 319
-#define EFFECT_FEINT 320
-#define EFFECT_SPARKLING_ARIA 321
-#define EFFECT_ACUPRESSURE 322
-#define EFFECT_AROMATIC_MIST 323
-#define EFFECT_POWDER 324
-#define EFFECT_SP_ATTACK_UP_HIT 325
-#define EFFECT_BELCH 326
-#define EFFECT_PARTING_SHOT 327
-#define EFFECT_SPECTRAL_THIEF 328
-#define EFFECT_V_CREATE 329
-#define EFFECT_MAT_BLOCK 330
-#define EFFECT_STOMPING_TANTRUM 331
-#define EFFECT_CORE_ENFORCER 332
-#define EFFECT_INSTRUCT 333
-#define EFFECT_THROAT_CHOP 334
-#define EFFECT_LASER_FOCUS 335
-#define EFFECT_MAGNETIC_FLUX 336
-#define EFFECT_GEAR_UP 337
-#define EFFECT_INCINERATE 338
-#define EFFECT_BUG_BITE 339
-#define EFFECT_STRENGTH_SAP 340
-#define EFFECT_MIND_BLOWN 341
-#define EFFECT_PURIFY 342
-#define EFFECT_BURN_UP 343
-#define EFFECT_SHORE_UP 344
-#define EFFECT_GEOMANCY 345
-#define EFFECT_FAIRY_LOCK 346
-#define EFFECT_ALLY_SWITCH 347
-#define EFFECT_SLEEP_HIT 348 // Relic Song
+#define EFFECT_CHANGE_TYPE_ON_ITEM 299 // Techno Blast, Multi Attack, Judgment
+#define EFFECT_AUTOTOMIZE 300
+#define EFFECT_COPYCAT 301
+#define EFFECT_DEFOG 302
+#define EFFECT_HIT_ENEMY_HEAL_ALLY 303 // Pollen Puff
+#define EFFECT_SMACK_DOWN 304
+#define EFFECT_SYNCHRONOISE 305
+#define EFFECT_PSYCHO_SHIFT 306
+#define EFFECT_POWER_TRICK 307
+#define EFFECT_FLAME_BURST 308
+#define EFFECT_AFTER_YOU 309
+#define EFFECT_BESTOW 310
+#define EFFECT_ROTOTILLER 311
+#define EFFECT_FLOWER_SHIELD 312
+#define EFFECT_HIT_PREVENT_ESCAPE 313
+#define EFFECT_SPEED_SWAP 314
+#define EFFECT_DEFENSE_UP2_HIT 315
+#define EFFECT_REVELATION_DANCE 316
+#define EFFECT_AURORA_VEIL 317
+#define EFFECT_THIRD_TYPE 318
+#define EFFECT_FEINT 319
+#define EFFECT_SPARKLING_ARIA 320
+#define EFFECT_ACUPRESSURE 321
+#define EFFECT_AROMATIC_MIST 322
+#define EFFECT_POWDER 323
+#define EFFECT_SP_ATTACK_UP_HIT 324
+#define EFFECT_BELCH 325
+#define EFFECT_PARTING_SHOT 326
+#define EFFECT_SPECTRAL_THIEF 327
+#define EFFECT_V_CREATE 328
+#define EFFECT_MAT_BLOCK 329
+#define EFFECT_STOMPING_TANTRUM 330
+#define EFFECT_CORE_ENFORCER 331
+#define EFFECT_INSTRUCT 332
+#define EFFECT_THROAT_CHOP 333
+#define EFFECT_LASER_FOCUS 334
+#define EFFECT_MAGNETIC_FLUX 335
+#define EFFECT_GEAR_UP 336
+#define EFFECT_INCINERATE 337
+#define EFFECT_BUG_BITE 338
+#define EFFECT_STRENGTH_SAP 339
+#define EFFECT_MIND_BLOWN 340
+#define EFFECT_PURIFY 341
+#define EFFECT_BURN_UP 342
+#define EFFECT_SHORE_UP 343
+#define EFFECT_GEOMANCY 344
+#define EFFECT_FAIRY_LOCK 345
+#define EFFECT_ALLY_SWITCH 346
+#define EFFECT_SLEEP_HIT 347 // Relic Song
 
 #endif  // GUARD_CONSTANTS_BATTLE_MOVE_EFFECTS_H
diff --git a/include/constants/hold_effects.h b/include/constants/hold_effects.h
index 669d7c0b8d..85017cb405 100644
--- a/include/constants/hold_effects.h
+++ b/include/constants/hold_effects.h
@@ -134,6 +134,7 @@
 #define HOLD_EFFECT_SEEDS            151
 #define HOLD_EFFECT_ADRENALINE_ORB   152
 #define HOLD_EFFECT_MEMORY           153
+#define HOLD_EFFECT_PLATE            154
 
 #define HOLD_EFFECT_CHOICE(holdEffect)((holdEffect == HOLD_EFFECT_CHOICE_BAND || holdEffect == HOLD_EFFECT_CHOICE_SCARF || holdEffect == HOLD_EFFECT_CHOICE_SPECS))
 
diff --git a/src/battle_main.c b/src/battle_main.c
index 34280b32cc..e0cfbf867d 100644
--- a/src/battle_main.c
+++ b/src/battle_main.c
@@ -4988,20 +4988,11 @@ void SetTypeBeforeUsingMove(u16 move, u8 battlerAtk)
             gBattleStruct->dynamicMoveType++;
         gBattleStruct->dynamicMoveType |= 0xC0;
     }
-    else if (gBattleMoves[move].effect == EFFECT_TECHNO_BLAST)
+    else if (gBattleMoves[move].effect == EFFECT_CHANGE_TYPE_ON_ITEM)
     {
-        if (GetBattlerHoldEffect(battlerAtk, TRUE) == HOLD_EFFECT_DRIVE)
+        if (GetBattlerHoldEffect(battlerAtk, TRUE) == gBattleMoves[move].argument)
             gBattleStruct->dynamicMoveType = ItemId_GetSecondaryId(gBattleMons[battlerAtk].item) | 0x80;
     }
-    else if (move == MOVE_MULTI_ATTACK)
-    {
-        if (GetBattlerHoldEffect(battlerAtk, TRUE) == HOLD_EFFECT_MEMORY)
-            gBattleStruct->dynamicMoveType = ItemId_GetSecondaryId(gBattleMons[battlerAtk].item) | 0x80;
-    }
-    else if (gBattleMoves[move].effect == EFFECT_JUDGMENT)
-    {
-        // TODO:
-    }
     else if (gBattleMoves[move].effect == EFFECT_REVELATION_DANCE)
     {
         if (gBattleMons[battlerAtk].type1 != TYPE_MYSTERY)
@@ -5027,7 +5018,7 @@ void SetTypeBeforeUsingMove(u16 move, u8 battlerAtk)
     else if (gBattleMoves[move].type == TYPE_NORMAL
              && gBattleMoves[move].effect != EFFECT_HIDDEN_POWER
              && gBattleMoves[move].effect != EFFECT_WEATHER_BALL
-             && gBattleMoves[move].effect != EFFECT_JUDGMENT
+             && gBattleMoves[move].effect != EFFECT_CHANGE_TYPE_ON_ITEM
              && gBattleMoves[move].effect != EFFECT_NATURAL_GIFT
              && ((attackerAbility == ABILITY_PIXILATE && (ateType = TYPE_FAIRY))
                  || (attackerAbility == ABILITY_REFRIGERATE && (ateType = TYPE_ICE))
diff --git a/src/battle_util.c b/src/battle_util.c
index 480e1d57d7..00aa19f8c2 100644
--- a/src/battle_util.c
+++ b/src/battle_util.c
@@ -926,7 +926,11 @@ static const u16 sTypeEffectivenessTable[NUMBER_OF_MON_TYPES][NUMBER_OF_MON_TYPE
     {X(1.0), X(1.0), X(0.0), X(2.0), X(1.0), X(2.0), X(0.5), X(1.0), X(2.0), X(1.0), X(2.0), X(1.0), X(0.5), X(2.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0)}, // ground
     {X(1.0), X(0.5), X(2.0), X(1.0), X(0.5), X(1.0), X(2.0), X(1.0), X(0.5), X(1.0), X(2.0), X(1.0), X(1.0), X(1.0), X(1.0), X(2.0), X(1.0), X(1.0), X(1.0)}, // rock
     {X(1.0), X(0.5), X(0.5), X(0.5), X(1.0), X(1.0), X(1.0), X(0.5), X(0.5), X(1.0), X(0.5), X(1.0), X(2.0), X(1.0), X(2.0), X(1.0), X(1.0), X(2.0), X(0.5)}, // bug
+    #if B_STEEL_RESISTANCES >= GEN_6
     {X(0.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(2.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(2.0), X(1.0), X(1.0), X(0.5), X(1.0)}, // ghost
+    #else
+    {X(0.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(2.0), X(0.5), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(2.0), X(1.0), X(1.0), X(0.5), X(1.0)}, // ghost
+    #endif
     {X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(2.0), X(1.0), X(1.0), X(0.5), X(1.0), X(0.5), X(0.5), X(1.0), X(0.5), X(1.0), X(2.0), X(1.0), X(1.0), X(2.0)}, // steel
     {X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0)}, // mystery
     {X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(0.5), X(2.0), X(1.0), X(2.0), X(1.0), X(0.5), X(0.5), X(2.0), X(1.0), X(1.0), X(2.0), X(0.5), X(1.0), X(1.0)}, // fire
@@ -936,7 +940,11 @@ static const u16 sTypeEffectivenessTable[NUMBER_OF_MON_TYPES][NUMBER_OF_MON_TYPE
     {X(1.0), X(2.0), X(1.0), X(2.0), X(1.0), X(1.0), X(1.0), X(1.0), X(0.5), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(0.5), X(1.0), X(1.0), X(0.0), X(1.0)}, // psychic
     {X(1.0), X(1.0), X(2.0), X(1.0), X(2.0), X(1.0), X(1.0), X(1.0), X(0.5), X(1.0), X(0.5), X(0.5), X(2.0), X(1.0), X(1.0), X(0.5), X(2.0), X(1.0), X(1.0)}, // ice
     {X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(0.5), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(2.0), X(1.0), X(0.0)}, // dragon
+    #if B_STEEL_RESISTANCES >= GEN_6
     {X(1.0), X(0.5), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(2.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(2.0), X(1.0), X(1.0), X(0.5), X(0.5)}, // dark
+    #else
+    {X(1.0), X(0.5), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(2.0), X(0.5), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(2.0), X(1.0), X(1.0), X(0.5), X(0.5)}, // dark
+    #endif
     {X(1.0), X(2.0), X(1.0), X(0.5), X(1.0), X(1.0), X(1.0), X(1.0), X(0.5), X(1.0), X(0.5), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(2.0), X(2.0), X(1.0)}, // fairy
 };
 
@@ -950,7 +958,11 @@ static const u16 sInverseTypeEffectivenessTable[NUMBER_OF_MON_TYPES][NUMBER_OF_M
     {X(1.0), X(1.0), X(2.0), X(0.5), X(1.0), X(0.5), X(2.0), X(1.0), X(0.5), X(1.0), X(0.5), X(1.0), X(2.0), X(0.5), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0)}, // ground
     {X(1.0), X(2.0), X(0.5), X(1.0), X(2.0), X(1.0), X(0.5), X(1.0), X(2.0), X(1.0), X(0.5), X(1.0), X(1.0), X(1.0), X(1.0), X(0.5), X(1.0), X(1.0), X(1.0)}, // rock
     {X(1.0), X(2.0), X(2.0), X(2.0), X(1.0), X(1.0), X(1.0), X(2.0), X(2.0), X(1.0), X(2.0), X(1.0), X(0.5), X(1.0), X(0.5), X(1.0), X(1.0), X(0.5), X(2.0)}, // bug
+    #if B_STEEL_RESISTANCES >= GEN_6
     {X(2.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(0.5), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(0.5), X(1.0), X(1.0), X(2.0), X(1.0)}, // ghost
+    #else
+    {X(2.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(0.5), X(2.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(0.5), X(1.0), X(1.0), X(2.0), X(1.0)}, // ghost
+    #endif
     {X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(0.5), X(1.0), X(1.0), X(2.0), X(1.0), X(2.0), X(2.0), X(1.0), X(2.0), X(1.0), X(0.5), X(1.0), X(1.0), X(0.5)}, // steel
     {X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0)}, // mystery
     {X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(2.0), X(0.5), X(1.0), X(0.5), X(1.0), X(2.0), X(2.0), X(0.5), X(1.0), X(1.0), X(0.5), X(2.0), X(1.0), X(1.0)}, // fire
@@ -960,7 +972,11 @@ static const u16 sInverseTypeEffectivenessTable[NUMBER_OF_MON_TYPES][NUMBER_OF_M
     {X(1.0), X(0.5), X(1.0), X(0.5), X(1.0), X(1.0), X(1.0), X(1.0), X(2.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(2.0), X(1.0), X(1.0), X(2.0), X(1.0)}, // psychic
     {X(1.0), X(1.0), X(0.5), X(1.0), X(0.5), X(1.0), X(1.0), X(1.0), X(2.0), X(1.0), X(2.0), X(2.0), X(0.5), X(1.0), X(1.0), X(2.0), X(0.5), X(1.0), X(1.0)}, // ice
     {X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(2.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(0.5), X(1.0), X(2.0)}, // dragon
+    #if B_STEEL_RESISTANCES >= GEN_6
     {X(1.0), X(2.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(0.5), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(0.5), X(1.0), X(1.0), X(2.0), X(2.0)}, // dark
+    #else
+    {X(1.0), X(2.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(0.5), X(2.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(0.5), X(1.0), X(1.0), X(2.0), X(2.0)}, // dark
+    #endif
     {X(1.0), X(0.5), X(1.0), X(2.0), X(1.0), X(1.0), X(1.0), X(1.0), X(2.0), X(1.0), X(2.0), X(1.0), X(1.0), X(1.0), X(1.0), X(1.0), X(0.5), X(0.5), X(1.0)}, // fairy
 };
 
@@ -6729,6 +6745,10 @@ static u32 CalcMoveBasePowerAfterModifiers(u16 move, u8 battlerAtk, u8 battlerDe
             }
         }
         break;
+    case HOLD_EFFECT_PLATE:
+        if (moveType == ItemId_GetSecondaryId(gBattleMons[battlerAtk].item))
+            MulModifier(&modifier, holdEffectModifier);
+        break;
     }
 
     // move effect
diff --git a/src/data/battle_moves.h b/src/data/battle_moves.h
index b290b2a5bf..cba21d1401 100644
--- a/src/data/battle_moves.h
+++ b/src/data/battle_moves.h
@@ -7006,7 +7006,7 @@ const struct BattleMove gBattleMoves[MOVES_COUNT] =
 
     [MOVE_JUDGMENT] =
     {
-        .effect = EFFECT_JUDGMENT,
+        .effect = EFFECT_CHANGE_TYPE_ON_ITEM,
         .power = 100,
         .type = TYPE_NORMAL,
         .accuracy = 100,
@@ -7016,6 +7016,7 @@ const struct BattleMove gBattleMoves[MOVES_COUNT] =
         .priority = 0,
         .flags = FLAG_PROTECT_AFFECTED | FLAG_MIRROR_MOVE_AFFECTED | FLAG_KINGSROCK_AFFECTED,
         .split = SPLIT_SPECIAL,
+        .argument = HOLD_EFFECT_PLATE,
     },
 
     [MOVE_BUG_BITE] =
@@ -8456,7 +8457,7 @@ const struct BattleMove gBattleMoves[MOVES_COUNT] =
         #else
             .power = 85,
         #endif
-        .effect = EFFECT_TECHNO_BLAST,
+        .effect = EFFECT_CHANGE_TYPE_ON_ITEM,
         .type = TYPE_NORMAL,
         .accuracy = 100,
         .pp = 5,
@@ -8465,6 +8466,7 @@ const struct BattleMove gBattleMoves[MOVES_COUNT] =
         .priority = 0,
         .flags = FLAG_PROTECT_AFFECTED | FLAG_MIRROR_MOVE_AFFECTED | FLAG_KINGSROCK_AFFECTED,
         .split = SPLIT_SPECIAL,
+        .argument = HOLD_EFFECT_DRIVE
     },
 
     [MOVE_RELIC_SONG] =
@@ -10263,7 +10265,7 @@ const struct BattleMove gBattleMoves[MOVES_COUNT] =
         #else
             .power = 90,
         #endif
-        .effect = EFFECT_PLACEHOLDER,
+        .effect = EFFECT_CHANGE_TYPE_ON_ITEM,
         .type = TYPE_NORMAL,
         .accuracy = 100,
         .pp = 10,
@@ -10272,6 +10274,7 @@ const struct BattleMove gBattleMoves[MOVES_COUNT] =
         .priority = 0,
         .flags = FLAG_MAKES_CONTACT | FLAG_PROTECT_AFFECTED | FLAG_MIRROR_MOVE_AFFECTED | FLAG_KINGSROCK_AFFECTED,
         .split = SPLIT_PHYSICAL,
+        .argument = HOLD_EFFECT_MEMORY,
     },
 
     [MOVE_MIND_BLOWN] =