Gave an entrance animation to Delta Stream

data/battle_anim_scripts.s

@@ -822,6 +822,7 @@ gBattleAnims_General::
 	.4byte General_SlideOffScreen           @ B_ANIM_SLIDE_OFFSCREEN
 	.4byte General_RestoreBg                @ B_ANIM_RESTORE_BG
 	.4byte General_TotemFlare               @ B_ANIM_TOTEM_FLARE
+	.4byte General_StrongWinds              @ B_ANIM_STRONG_WINDS
 
 	.align 2
 gBattleAnims_Special::
@@ -24397,6 +24398,30 @@ General_TotemFlare::
 	clearmonbg ANIM_ATTACKER
 	end
 
+General_StrongWinds::
+	loadspritegfx ANIM_TAG_FLYING_DIRT
+	playsewithpan SE_M_GUST, 0
+	createvisualtask AnimTask_BlendParticle, 5, ANIM_TAG_FLYING_DIRT, 0, 12, 12, RGB(20, 20, 20)
+	waitforvisualfinish
+	createvisualtask AnimTask_LoadWindstormBackground, 5, FALSE
+	delay 16
+	createsprite gFlyingSandCrescentSpriteTemplate, ANIM_ATTACKER, 40, 10, 2304, 96, 0
+	delay 10
+	createsprite gFlyingSandCrescentSpriteTemplate, ANIM_ATTACKER, 40, 90, 2048, 96, 0
+	delay 10
+	createsprite gFlyingSandCrescentSpriteTemplate, ANIM_ATTACKER, 40, 50, 2560, 96, 0
+	delay 10
+	createsprite gFlyingSandCrescentSpriteTemplate, ANIM_ATTACKER, 40, 20, 2304, 96, 0
+	delay 10
+	createsprite gFlyingSandCrescentSpriteTemplate, ANIM_ATTACKER, 40, 70, 1984, 96, 0
+	delay 10
+	createsprite gFlyingSandCrescentSpriteTemplate, ANIM_ATTACKER, 40, 0, 2816, 96, 0
+	delay 10
+	createsprite gFlyingSandCrescentSpriteTemplate, ANIM_ATTACKER, 40, 60, 2560, 96, 0
+	waitforvisualfinish
+	stopsound
+	end
+
 RainbowEndureEffect:
 	launchtemplate gBlueEndureEnergySpriteTemplate 0x2 0x4 0x0 0xffe8 0x1a 0x2
 	delay 0x3

data/battle_scripts_1.s

@@ -6933,7 +6933,8 @@ BattleScript_DeltaStreamActivates::
 	pause B_WAIT_TIME_SHORT
 	call BattleScript_AbilityPopUp
 	printstring STRINGID_MYSTERIOUSAIRCURRENT
-	waitmessage B_WAIT_TIME_LONG
+	waitstate
+	playanimation BS_ATTACKER, B_ANIM_STRONG_WINDS, NULL
 	end3
 
 BattleScript_AttackWeakenedByStrongWinds::

include/constants/battle_anim.h

@@ -523,6 +523,7 @@
 #define B_ANIM_SLIDE_OFFSCREEN          26 // for Emergency Exit
 #define B_ANIM_RESTORE_BG               27 // for Terrain Endings
 #define B_ANIM_TOTEM_FLARE              28 // Totem boosts aura flare
+#define B_ANIM_STRONG_WINDS             29
 
 // special animations table (gBattleAnims_Special)
 #define B_ANIM_LVL_UP                   0

include/graphics.h

@@ -4697,6 +4697,7 @@ extern const u32 gBattleAnimSpritePal_MagnifyingGlass[];
 extern const u32 gBattleAnimSpritePal_BrownOrb[];
 extern const u32 gBattleAnimSpritePal_MetalSoundWaves[];
 extern const u32 gBattleAnimSpritePal_FlyingDirt[];
+extern const u32 gBattleAnimSpritePal_Windstorm[];
 extern const u32 gBattleAnimSpritePal_IcicleSpear[];
 extern const u32 gBattleAnimSpritePal_Hail[];
 extern const u32 gBattleAnimSpritePal_GlowyRedOrb[];
@@ -5199,6 +5200,9 @@ extern const u16 gSlotMachineReelTimePikachu_Pal[];
 extern const u32 gBattleAnimBgTilemap_Sandstorm[];
 extern const u32 gBattleAnimBgImage_Sandstorm[];
 
+extern const u32 gBattleAnimBgTilemap_Windstorm[];
+extern const u32 gBattleAnimBgImage_Windstorm[];
+
 // Pokedex Area Screen
 extern const u32 gPokedexAreaScreenAreaUnknown_Gfx[];
 extern const u16 gPokedexAreaScreenAreaUnknown_Pal[];

src/battle_anim_flying.c

@@ -5,6 +5,8 @@
 #include "constants/battle_anim.h"
 #include "constants/rgb.h"
 #include "random.h"
+#include "gpu_regs.h"
+#include "graphics.h"
 
 extern const struct SpriteTemplate gFlashingHitSplatSpriteTemplate;
 
@@ -30,7 +32,7 @@ static void AnimUnusedFlashingLight_Step(struct Sprite *);
 static void AnimSkyAttackBird(struct Sprite *);
 static void AnimSkyAttackBird_Step(struct Sprite *);
 static void AnimTask_AnimateGustTornadoPalette_Step(u8);
-
+static void AnimTask_LoadWindstormBackground_Step(u8 taskId);
 
 const struct SpriteTemplate gEllipticalGustSpriteTemplate =
 {
@@ -1231,3 +1233,99 @@ static void AnimTask_SetAttackerVisibility(u8 taskId)
     }
     DestroyAnimVisualTask(taskId);
 }
+
+void AnimTask_LoadWindstormBackground(u8 taskId)
+{
+    int var0;
+    struct BattleAnimBgData animBg;
+
+    var0 = 0;
+    SetGpuReg(REG_OFFSET_BLDCNT, BLDCNT_TGT1_BG1 | BLDCNT_TGT2_ALL | BLDCNT_EFFECT_BLEND);
+    SetGpuReg(REG_OFFSET_BLDALPHA, BLDALPHA_BLEND(0, 16));
+    SetAnimBgAttribute(1, BG_ANIM_PRIORITY, 1);
+    SetAnimBgAttribute(1, BG_ANIM_SCREEN_SIZE, 0);
+
+    if (!IsContest())
+        SetAnimBgAttribute(1, BG_ANIM_CHAR_BASE_BLOCK, 1);
+
+    gBattle_BG1_X = 0;
+    gBattle_BG1_Y = 0;
+    SetGpuReg(REG_OFFSET_BG1HOFS, gBattle_BG1_X);
+    SetGpuReg(REG_OFFSET_BG1VOFS, gBattle_BG1_Y);
+
+    GetBattleAnimBg1Data(&animBg);
+    AnimLoadCompressedBgGfx(animBg.bgId, gBattleAnimBgImage_Windstorm, animBg.tilesOffset);
+    AnimLoadCompressedBgTilemapHandleContest(&animBg, gBattleAnimBgTilemap_Windstorm, 0);
+    LoadCompressedPalette(gBattleAnimSpritePal_Windstorm, animBg.paletteId * 16, 32);
+
+    if (gBattleAnimArgs[0] && GetBattlerSide(gBattleAnimAttacker) != B_SIDE_PLAYER)
+        var0 = 1;
+
+    gTasks[taskId].data[0] = var0;
+    gTasks[taskId].func = AnimTask_LoadWindstormBackground_Step;
+}
+
+static void AnimTask_LoadWindstormBackground_Step(u8 taskId)
+{
+    struct BattleAnimBgData animBg;
+
+    if (gTasks[taskId].data[0] == 0)
+        gBattle_BG1_X += -6;
+    else
+        gBattle_BG1_X += 6;
+
+    gBattle_BG1_Y += -1;
+
+    switch (gTasks[taskId].data[12])
+    {
+    case 0:
+        if (++gTasks[taskId].data[10] == 4)
+        {
+            gTasks[taskId].data[10] = 0;
+            gTasks[taskId].data[11]++;
+            SetGpuReg(REG_OFFSET_BLDALPHA, BLDALPHA_BLEND(gTasks[taskId].data[11], 16 - gTasks[taskId].data[11]));
+            if (gTasks[taskId].data[11] == 7)
+            {
+                gTasks[taskId].data[12]++;
+                gTasks[taskId].data[11] = 0;
+            }
+        }
+        break;
+    case 1:
+        if (++gTasks[taskId].data[11] == 101)
+        {
+            gTasks[taskId].data[11] = 7;
+            gTasks[taskId].data[12]++;
+        }
+        break;
+    case 2:
+        if (++gTasks[taskId].data[10] == 4)
+        {
+            gTasks[taskId].data[10] = 0;
+            gTasks[taskId].data[11]--;
+            SetGpuReg(REG_OFFSET_BLDALPHA, BLDALPHA_BLEND(gTasks[taskId].data[11], 16 - gTasks[taskId].data[11]));
+            if (gTasks[taskId].data[11] == 0)
+            {
+                gTasks[taskId].data[12]++;
+                gTasks[taskId].data[11] = 0;
+            }
+        }
+        break;
+    case 3:
+        GetBattleAnimBg1Data(&animBg);
+        ClearBattleAnimBg(animBg.bgId);
+        gTasks[taskId].data[12]++;
+        break;
+    case 4:
+        if (!IsContest())
+            SetAnimBgAttribute(1, BG_ANIM_CHAR_BASE_BLOCK, 0);
+
+        gBattle_BG1_X = 0;
+        gBattle_BG1_Y = 0;
+        SetGpuReg(REG_OFFSET_BLDCNT, 0);
+        SetGpuReg(REG_OFFSET_BLDALPHA, 0);
+        SetAnimBgAttribute(1, BG_ANIM_PRIORITY, 1);
+        DestroyAnimVisualTask(taskId);
+        break;
+    }
+}

src/graphics.c

@@ -1312,11 +1312,14 @@ const u32 gUnknown_08D85A1C[] = INCBIN_U32("graphics/battle_frontier/battle_tile
 #include "data/graphics/intro_scene.h"
 
 const u32 gBattleAnimSpriteGfx_FlyingDirt[] = INCBIN_U32("graphics/battle_anims/sprites/flying_dirt.4bpp.lz");
+const u32 gBattleAnimSpritePal_FlyingDirt[] = INCBIN_U32("graphics/battle_anims/sprites/flying_dirt.gbapal.lz");
 
 const u32 gBattleAnimBgTilemap_Sandstorm[] = INCBIN_U32("graphics/battle_anims/backgrounds/sandstorm_brew.bin.lz");
 const u32 gBattleAnimBgImage_Sandstorm[] = INCBIN_U32("graphics/battle_anims/backgrounds/sandstorm_brew.4bpp.lz");
 
-const u32 gBattleAnimSpritePal_FlyingDirt[] = INCBIN_U32("graphics/battle_anims/sprites/flying_dirt.gbapal.lz");
+const u32 gBattleAnimBgTilemap_Windstorm[] = INCBIN_U32("graphics/battle_anims/backgrounds/sandstorm_brew.bin.lz");
+const u32 gBattleAnimBgImage_Windstorm[] = INCBIN_U32("graphics/battle_anims/backgrounds/windstorm_brew.4bpp.lz");
+const u32 gBattleAnimSpritePal_Windstorm[] = INCBIN_U32("graphics/battle_anims/backgrounds/windstorm_brew.gbapal.lz");
 
 const u32 gBattleAnimSpriteGfx_MetalSoundWaves[] = INCBIN_U32("graphics/battle_anims/sprites/metal_sound_waves.4bpp.lz");
 const u32 gBattleAnimSpritePal_MetalSoundWaves[] = INCBIN_U32("graphics/battle_anims/sprites/metal_sound_waves.gbapal.lz");