Fast healing Nurse Joy

By PCG.

Another simple tutorial to speed up Nurse Joy (like in Radical Red).

Editing the script

In data/scripts/pkmn_center_nurse.inc

Common_EventScript_PkmnCenterNurse::
	lock
	faceplayer
-	setvar VAR_0x8004, 0
-	specialvar VAR_RESULT, CountPlayerTrainerStars
-	goto_if_eq VAR_RESULT, 4, EventScript_PkmnCenterNurse_GoldCard
-	msgbox gText_WouldYouLikeToRestYourPkmn, MSGBOX_YESNO
-	goto_if_eq VAR_RESULT, YES, EventScript_PkmnCenterNurse_HealPkmn
-	goto_if_eq VAR_RESULT, NO, EventScript_PkmnCenterNurse_Goodbye
+	incrementgamestat GAME_STAT_USED_POKECENTER
+	call EventScript_PkmnCenterNurse_TakeAndHealPkmn
+	applymovement VAR_0x800B, Movement_PkmnCenterNurse_Bow
+	waitmovement 0
+	applymovement OBJ_EVENT_ID_PLAYER, Common_Movement_FaceDown
+	waitmovement 0
	end

This will remove all the long text interactions. It also skips Gold Trainer Card, Union Room and Pokérus check.

Editing the code

In src/field_effect.c

Here, all we need to do is reduce the timer of placing the Poké Balls and healing, and account for the healing sound effect.

Search for PokeballGlowEffect_PlaceBalls(struct Sprite *sprite).

static void PokeballGlowEffect_PlaceBalls(struct Sprite *sprite)
{
    u8 spriteId;
    if (sprite->sTimer == 0 || (--sprite->sTimer) == 0)
    {
-        sprite->sTimer = 25;
+        sprite->sTimer = 12;
        spriteId = CreateSpriteAtEnd(&sSpriteTemplate_PokeballGlow, sPokeballCoordOffsets[sprite->sCounter].x + sprite->x2, sPokeballCoordOffsets[sprite->sCounter].y + sprite->y2, 0);
        gSprites[spriteId].oam.priority = 2;
        gSprites[spriteId].sEffectSpriteId = sprite->sSpriteId;
        sprite->sCounter++;
        sprite->sNumMons--;
        PlaySE(SE_BALL);
    }
    if (sprite->sNumMons == 0)
    {
-        sprite->sTimer = 32;
+        sprite->sTimer = 16;
        sprite->sState++;
    }
}

static void PokeballGlowEffect_TryPlaySe(struct Sprite *sprite)
{
    if ((--sprite->sTimer) == 0)
    {
        sprite->sState++;
-        sprite->sTimer = 8;
+        sprite->sTimer = 4;
        sprite->sCounter = 0;
        sprite->data[3] = 0;
        if (sprite->sPlayHealSe)
        {
            PlayFanfare(MUS_HEAL);
        }
    }
}

static void PokeballGlowEffect_Flash1(struct Sprite *sprite)
{
    u8 phase;
    if ((--sprite->sTimer) == 0)
    {
-        sprite->sTimer = 8;
+        sprite->sTimer = 4;
        sprite->sCounter++;
        sprite->sCounter &= 3;

        if (sprite->sCounter == 0)
            sprite->data[3]++;
    }
    phase = (sprite->sCounter + 3) & 3;
    MultiplyInvertedPaletteRGBComponents(OBJ_PLTT_ID(IndexOfSpritePaletteTag(FLDEFF_PAL_TAG_POKEBALL_GLOW)) + 8, sPokeballGlowReds[phase], sPokeballGlowGreens[phase], sPokeballGlowBlues[phase]);
    phase = (sprite->sCounter + 2) & 3;
    MultiplyInvertedPaletteRGBComponents(OBJ_PLTT_ID(IndexOfSpritePaletteTag(FLDEFF_PAL_TAG_POKEBALL_GLOW)) + 6, sPokeballGlowReds[phase], sPokeballGlowGreens[phase], sPokeballGlowBlues[phase]);
    phase = (sprite->sCounter + 1) & 3;
    MultiplyInvertedPaletteRGBComponents(OBJ_PLTT_ID(IndexOfSpritePaletteTag(FLDEFF_PAL_TAG_POKEBALL_GLOW)) + 2, sPokeballGlowReds[phase], sPokeballGlowGreens[phase], sPokeballGlowBlues[phase]);
    phase = sprite->sCounter;
    MultiplyInvertedPaletteRGBComponents(OBJ_PLTT_ID(IndexOfSpritePaletteTag(FLDEFF_PAL_TAG_POKEBALL_GLOW)) + 5, sPokeballGlowReds[phase], sPokeballGlowGreens[phase], sPokeballGlowBlues[phase]);
    MultiplyInvertedPaletteRGBComponents(OBJ_PLTT_ID(IndexOfSpritePaletteTag(FLDEFF_PAL_TAG_POKEBALL_GLOW)) + 3, sPokeballGlowReds[phase], sPokeballGlowGreens[phase], sPokeballGlowBlues[phase]);
    if (sprite->data[3] > 2)
    {
        sprite->sState++;
-        sprite->sTimer = 8;
+        sprite->sTimer = 4;
        sprite->sCounter = 0;
    }
}

static void PokeballGlowEffect_Flash2(struct Sprite *sprite)
{
    u8 phase;
    if ((--sprite->sTimer) == 0)
    {
-        sprite->sTimer = 8;
+        sprite->sTimer = 4;
        sprite->sCounter++;
        sprite->sCounter &= 3;
        if (sprite->sCounter == 3)
        {
            sprite->sState++;
            sprite->sTimer = 15;
        }
    }
    phase = sprite->sCounter;
    MultiplyInvertedPaletteRGBComponents(OBJ_PLTT_ID(IndexOfSpritePaletteTag(FLDEFF_PAL_TAG_POKEBALL_GLOW)) + 8, sPokeballGlowReds[phase], sPokeballGlowGreens[phase], sPokeballGlowBlues[phase]);
    MultiplyInvertedPaletteRGBComponents(OBJ_PLTT_ID(IndexOfSpritePaletteTag(FLDEFF_PAL_TAG_POKEBALL_GLOW)) + 6, sPokeballGlowReds[phase], sPokeballGlowGreens[phase], sPokeballGlowBlues[phase]);
    MultiplyInvertedPaletteRGBComponents(OBJ_PLTT_ID(IndexOfSpritePaletteTag(FLDEFF_PAL_TAG_POKEBALL_GLOW)) + 2, sPokeballGlowReds[phase], sPokeballGlowGreens[phase], sPokeballGlowBlues[phase]);
    MultiplyInvertedPaletteRGBComponents(OBJ_PLTT_ID(IndexOfSpritePaletteTag(FLDEFF_PAL_TAG_POKEBALL_GLOW)) + 5, sPokeballGlowReds[phase], sPokeballGlowGreens[phase], sPokeballGlowBlues[phase]);
    MultiplyInvertedPaletteRGBComponents(OBJ_PLTT_ID(IndexOfSpritePaletteTag(FLDEFF_PAL_TAG_POKEBALL_GLOW)) + 3, sPokeballGlowReds[phase], sPokeballGlowGreens[phase], sPokeballGlowBlues[phase]);
}

Scroll down to find PokeballGlowEffect_WaitForSound(struct Sprite *sprite) and add this else condition.

static void PokeballGlowEffect_WaitForSound(struct Sprite *sprite)
{
    if (sprite->sPlayHealSe == FALSE || IsFanfareTaskInactive())
    {
        sprite->sState++;
    }
+    else
+    {
+        if (sprite->data[3]++ > 30)
+        {
+            sprite->sState++;
+        }
+    }
}

Scroll a bit more to find SpriteCB_PokecenterMonitor(struct Sprite *sprite) and add these lines before the last if condition. It is crucial to add it there and not at the end.

static void SpriteCB_PokecenterMonitor(struct Sprite *sprite)
{
    if (sprite->data[0] != 0)
    {
        sprite->data[0] = 0;
        sprite->invisible = FALSE;
        StartSpriteAnim(sprite, 1);
    }
+    if (!sprite->animEnded)
+    {
+        if (sprite->animDelayCounter > 0)
+            sprite->animDelayCounter -= 2;
+    }
    if (sprite->animEnded)
    {
        FieldEffectFreeGraphicsResources(sprite);
    }
}

And that's it! If you have any improvements for this, please reach out to me at our discord. :)