diff --git a/data/battle_ai_scripts.s b/data/battle_ai_scripts.s
index 5c8262260..e852ae838 100644
--- a/data/battle_ai_scripts.s
+++ b/data/battle_ai_scripts.s
@@ -234,6 +234,7 @@ AI_CheckBadMove_CheckEffect: @ 82DC045
 	if_effect EFFECT_FLING, AI_CBM_Fling
 	if_effect EFFECT_ATTACK_ACCURACY_UP, AI_CBM_AtkAccUp
 	if_effect EFFECT_ATTACK_SPATK_UP, AI_CBM_AtkSpAtkUp
+	if_effect EFFECT_GROWTH, AI_CBM_AtkSpAtkUp
 	end
 	
 AI_CBM_AtkAccUp:
diff --git a/data/battle_scripts_1.s b/data/battle_scripts_1.s
index 4d74c2d17..a3cead061 100644
--- a/data/battle_scripts_1.s
+++ b/data/battle_scripts_1.s
@@ -298,6 +298,42 @@ gBattleScriptsForMoveEffects:: @ 82D86A8
 	.4byte BattleScript_EffectScald
 	.4byte BattleScript_EffectReflectType
 	.4byte BattleScript_EffectSoak
+	.4byte BattleScript_EffectGrowth
+	
+BattleScript_EffectGrowth:
+	attackcanceler
+	attackstring
+	ppreduce
+	jumpifstat BS_ATTACKER, CMP_LESS_THAN, STAT_ATK, 0xC, BattleScript_GrowthDoMoveAnim
+	jumpifstat BS_ATTACKER, CMP_EQUAL, STAT_SPATK, 0xC, BattleScript_CantRaiseMultipleStats
+BattleScript_GrowthDoMoveAnim::
+	attackanimation
+	waitanimation
+	setbyte sSTAT_ANIM_PLAYED, FALSE
+	playstatchangeanimation BS_ATTACKER, BIT_ATK | BIT_SPATK, 0x0
+	jumpifhalfword CMP_COMMON_BITS, gBattleWeather, WEATHER_SUN_ANY, BattleScript_GrowthAtk2
+	setstatchanger STAT_ATK, 1, FALSE
+	goto BattleScript_GrowthAtk
+BattleScript_GrowthAtk2:
+	setstatchanger STAT_ATK, 2, FALSE
+BattleScript_GrowthAtk:
+	statbuffchange MOVE_EFFECT_AFFECTS_USER | 0x1, BattleScript_GrowthTrySpAtk
+	jumpifbyte CMP_EQUAL, cMULTISTRING_CHOOSER, 0x2, BattleScript_GrowthTrySpAtk
+	printfromtable gStatUpStringIds
+	waitmessage 0x40
+BattleScript_GrowthTrySpAtk::
+	jumpifhalfword CMP_COMMON_BITS, gBattleWeather, WEATHER_SUN_ANY, BattleScript_GrowthSpAtk2
+	setstatchanger STAT_SPATK, 1, FALSE
+	goto BattleScript_GrowthSpAtk
+BattleScript_GrowthSpAtk2:
+	setstatchanger STAT_SPATK, 2, FALSE
+BattleScript_GrowthSpAtk:
+	statbuffchange MOVE_EFFECT_AFFECTS_USER | 0x1, BattleScript_GrowthEnd
+	jumpifbyte CMP_EQUAL, cMULTISTRING_CHOOSER, 0x2, BattleScript_GrowthEnd
+	printfromtable gStatUpStringIds
+	waitmessage 0x40
+BattleScript_GrowthEnd:
+	goto BattleScript_MoveEnd
 	
 BattleScript_EffectSoak:
 	attackcanceler
@@ -426,13 +462,13 @@ BattleScript_AttackSpAttackUpDoMoveAnim::
 	attackanimation
 	waitanimation
 	setbyte sSTAT_ANIM_PLAYED, FALSE
-	playstatchangeanimation BS_ATTACKER, BIT_SPATK | BIT_SPDEF, 0x0
+	playstatchangeanimation BS_ATTACKER, BIT_ATK | BIT_SPATK, 0x0
 	setstatchanger STAT_ATK, 1, FALSE
-	statbuffchange MOVE_EFFECT_AFFECTS_USER | 0x1, BattleScript_AttackSpAttackUpTrySpDef
-	jumpifbyte CMP_EQUAL, cMULTISTRING_CHOOSER, 0x2, BattleScript_AttackSpAttackUpTrySpDef
+	statbuffchange MOVE_EFFECT_AFFECTS_USER | 0x1, BattleScript_AttackSpAttackUpTrySpAtk
+	jumpifbyte CMP_EQUAL, cMULTISTRING_CHOOSER, 0x2, BattleScript_AttackSpAttackUpTrySpAtk
 	printfromtable gStatUpStringIds
 	waitmessage 0x40
-BattleScript_AttackSpAttackUpTrySpDef::
+BattleScript_AttackSpAttackUpTrySpAtk::
 	setstatchanger STAT_SPATK, 1, FALSE
 	statbuffchange MOVE_EFFECT_AFFECTS_USER | 0x1, BattleScript_AttackSpAttackUpEnd
 	jumpifbyte CMP_EQUAL, cMULTISTRING_CHOOSER, 0x2, BattleScript_AttackSpAttackUpEnd
diff --git a/include/constants/battle_move_effects.h b/include/constants/battle_move_effects.h
index 37f97c9a7..7394a3404 100644
--- a/include/constants/battle_move_effects.h
+++ b/include/constants/battle_move_effects.h
@@ -287,5 +287,6 @@
 #define EFFECT_SCALD 281
 #define EFFECT_REFLECT_TYPE 282
 #define EFFECT_SOAK 283
+#define EFFECT_GROWTH 284
 
 #endif  // GUARD_CONSTANTS_BATTLE_MOVE_EFFECTS_H
diff --git a/src/battle_interface.c b/src/battle_interface.c
index 36e0d6aaa..a58ea00fe 100644
--- a/src/battle_interface.c
+++ b/src/battle_interface.c
@@ -1571,13 +1571,13 @@ void CreateMegaTriggerSprite(u8 battlerId, u8 palId)
     if (gBattleStruct->mega.triggerSpriteId == 0xFF)
     {
         if (gBattleTypeFlags & BATTLE_TYPE_DOUBLE)
-            gBattleStruct->mega.triggerSpriteId = CreateSprite(&sSpriteTemplate_MegaTrigger,
-                                                             gSprites[gHealthboxSpriteIds[battlerId]].pos1.x - SINGLES_MEGA_TRIGGER_POS_X_SLIDE,
-                                                             gSprites[gHealthboxSpriteIds[battlerId]].pos1.y - SINGLES_MEGA_TRIGGER_POS_Y_DIFF, 0);
-        else
             gBattleStruct->mega.triggerSpriteId = CreateSprite(&sSpriteTemplate_MegaTrigger,
                                                              gSprites[gHealthboxSpriteIds[battlerId]].pos1.x - DOUBLES_MEGA_TRIGGER_POS_X_SLIDE,
                                                              gSprites[gHealthboxSpriteIds[battlerId]].pos1.y - DOUBLES_MEGA_TRIGGER_POS_Y_DIFF, 0);
+        else
+            gBattleStruct->mega.triggerSpriteId = CreateSprite(&sSpriteTemplate_MegaTrigger,
+                                                             gSprites[gHealthboxSpriteIds[battlerId]].pos1.x - SINGLES_MEGA_TRIGGER_POS_X_SLIDE,
+                                                             gSprites[gHealthboxSpriteIds[battlerId]].pos1.y - SINGLES_MEGA_TRIGGER_POS_Y_DIFF, 0);
     }
     gSprites[gBattleStruct->mega.triggerSpriteId].tBattler = battlerId;
     gSprites[gBattleStruct->mega.triggerSpriteId].tHide = FALSE;
@@ -1610,7 +1610,7 @@ static void SpriteCb_MegaTrigger(struct Sprite *sprite)
         if (sprite->pos1.x != gSprites[gHealthboxSpriteIds[sprite->tBattler]].pos1.x - xSlide)
             sprite->pos1.x++;
 
-        if (sprite->pos1.x >= xPriority)
+        if (sprite->pos1.x >= gSprites[gHealthboxSpriteIds[sprite->tBattler]].pos1.x - xPriority)
             sprite->oam.priority = 2;
         else
             sprite->oam.priority = 1;
@@ -1625,7 +1625,7 @@ static void SpriteCb_MegaTrigger(struct Sprite *sprite)
         if (sprite->pos1.x != gSprites[gHealthboxSpriteIds[sprite->tBattler]].pos1.x - xOptimal)
             sprite->pos1.x--;
 
-        if (sprite->pos1.x >= xPriority)
+        if (sprite->pos1.x >= gSprites[gHealthboxSpriteIds[sprite->tBattler]].pos1.x - xPriority)
             sprite->oam.priority = 2;
         else
             sprite->oam.priority = 1;
diff --git a/src/data/battle_moves.h b/src/data/battle_moves.h
index c21f1b546..2f2c93245 100644
--- a/src/data/battle_moves.h
+++ b/src/data/battle_moves.h
@@ -892,7 +892,7 @@ const struct BattleMove gBattleMoves[MOVES_COUNT_GEN6] =
 		.split = SPLIT_STATUS,
 	},
 	{ // MOVE_GROWTH
-		.effect = EFFECT_SPECIAL_ATTACK_UP,
+		.effect = EFFECT_GROWTH,
 		.power = 0,
 		.type = TYPE_NORMAL,
 		.accuracy = 0,