Merge branch 'master' of https://github.com/pret/pokeemerald into decompile_item_menu

src/battle_controllers.c

@@ -64,7 +64,7 @@ void HandleLinkBattleSetup(void)
         if (gLinkVSyncDisabled)
             sub_800B488();
         if (!gReceivedRemoteLinkPlayers)
-            sub_8009734();
+            OpenLink();
         CreateTask(task00_08081A90, 0);
         CreateTasksForSendRecvLinkBuffers();
     }
@@ -793,9 +793,9 @@ static void Task_HandleSendLinkBuffersData(u8 taskId)
             else
                 var = (gBattleTypeFlags & BATTLE_TYPE_MULTI) ? 4 : 2;
 
-            if (sub_800ABAC() >= var)
+            if (GetLinkPlayerCount_2() >= var)
             {
-                if (sub_800ABBC())
+                if (IsLinkMaster())
                 {
                     sub_800A620();
                     gTasks[taskId].data[11]++;

src/coord_event_weather.c

@@ -0,0 +1,119 @@
+#include "global.h"
+#include "constants/weather.h"
+#include "coord_event_weather.h"
+#include "field_weather.h"
+
+struct CoordEventWeather
+{
+    u8 coordEventWeather;
+    void (*func)(void);
+};
+
+static void CoordEventWeather_Clouds(void);
+static void CoordEventWeather_Sunny(void);
+static void CoordEventWeather_LightRain(void);
+static void CoordEventWeather_Snow(void);
+static void CoordEventWeather_Thunderstorm(void);
+static void CoordEventWeather_Fog(void);
+static void CoordEventWeather_DiagonalFog(void);
+static void CoordEventWeather_Ash(void);
+static void CoordEventWeather_Sandstorm(void);
+static void CoordEventWeather_Dark(void);
+static void CoordEventWeather_Drought(void);
+static void CoordEventWeather_Route119Cycle(void);
+static void CoordEventWeather_Route123Cycle(void);
+
+static const struct CoordEventWeather sCoordEventWeatherFuncs[] =
+{
+    { COORD_EVENT_WEATHER_CLOUDS, CoordEventWeather_Clouds },
+    { COORD_EVENT_WEATHER_SUNNY, CoordEventWeather_Sunny },
+    { COORD_EVENT_WEATHER_RAIN_LIGHT, CoordEventWeather_LightRain },
+    { COORD_EVENT_WEATHER_SNOW, CoordEventWeather_Snow },
+    { COORD_EVENT_WEATHER_RAIN_MED, CoordEventWeather_Thunderstorm },
+    { COORD_EVENT_WEATHER_FOG_1, CoordEventWeather_Fog },
+    { COORD_EVENT_WEATHER_FOG_2, CoordEventWeather_DiagonalFog },
+    { COORD_EVENT_WEATHER_ASH, CoordEventWeather_Ash },
+    { COORD_EVENT_WEATHER_SANDSTORM, CoordEventWeather_Sandstorm },
+    { COORD_EVENT_WEATHER_SHADE, CoordEventWeather_Dark },
+    { COORD_EVENT_WEATHER_DROUGHT, CoordEventWeather_Drought },
+    { COORD_EVENT_WEATHER_ROUTE119_CYCLE, CoordEventWeather_Route119Cycle },
+    { COORD_EVENT_WEATHER_ROUTE123_CYCLE, CoordEventWeather_Route123Cycle },
+};
+
+static void CoordEventWeather_Clouds(void)
+{
+    SetWeather(WEATHER_CLOUDS);
+}
+
+static void CoordEventWeather_Sunny(void)
+{
+    SetWeather(WEATHER_SUNNY);
+}
+
+static void CoordEventWeather_LightRain(void)
+{
+    SetWeather(WEATHER_RAIN_LIGHT);
+}
+
+static void CoordEventWeather_Snow(void)
+{
+    SetWeather(WEATHER_SNOW);
+}
+
+static void CoordEventWeather_Thunderstorm(void)
+{
+    SetWeather(WEATHER_RAIN_MED);
+}
+
+static void CoordEventWeather_Fog(void)
+{
+    SetWeather(WEATHER_FOG_1);
+}
+
+static void CoordEventWeather_DiagonalFog(void)
+{
+    SetWeather(WEATHER_FOG_2);
+}
+
+static void CoordEventWeather_Ash(void)
+{
+    SetWeather(WEATHER_ASH);
+}
+
+static void CoordEventWeather_Sandstorm(void)
+{
+    SetWeather(WEATHER_SANDSTORM);
+}
+
+static void CoordEventWeather_Dark(void)
+{
+    SetWeather(WEATHER_SHADE);
+}
+
+static void CoordEventWeather_Drought(void)
+{
+    SetWeather(WEATHER_DROUGHT);
+}
+
+static void CoordEventWeather_Route119Cycle(void)
+{
+    SetWeather(WEATHER_ROUTE119_CYCLE);
+}
+
+static void CoordEventWeather_Route123Cycle(void)
+{
+    SetWeather(WEATHER_ROUTE123_CYCLE);
+}
+
+void DoCoordEventWeather(u8 coordEventWeather)
+{
+    u8 i;
+    for (i = 0; i < ARRAY_COUNT(sCoordEventWeatherFuncs); i++)
+    {
+        if (sCoordEventWeatherFuncs[i].coordEventWeather == coordEventWeather)
+        {
+            sCoordEventWeatherFuncs[i].func();
+            return;
+        }
+    }
+}

src/field_map_obj.c

@@ -14,7 +14,7 @@
 #include "rom_818CFC8.h"
 #include "rom_81BE66C.h"
 #include "field_ground_effect.h"
-#include "map_obj_8097404.h"
+#include "field_map_obj_helpers.h"
 #include "mauville_old_man.h"
 #include "metatile_behavior.h"
 #include "field_effect.h"

src/field_map_obj_helpers.c

@@ -0,0 +1,844 @@
+#include "global.h"
+#include "field_ground_effect.h"
+#include "field_map_obj.h"
+#include "field_effect.h"
+#include "field_map_obj_helpers.h"
+#include "malloc.h"
+#include "task.h"
+#include "util.h"
+
+typedef void (*SpriteStepFunc)(struct Sprite *sprite, u8 dir);
+
+extern const struct Coords16 gUnknown_0850DB7C[4];
+extern s16 gUnknown_0850E768[];
+extern SpriteStepFunc *const gUnknown_0850E754[];
+extern const s8 gUnknown_0850E772[];
+extern const s8 gUnknown_0850E7BA[];
+extern const s8 *const gUnknown_0850E834[];
+extern s16 gUnknown_0850E840[];
+extern u8 gUnknown_0850E846[];
+extern s16 gUnknown_0850E84A[];
+extern u8 gUnknown_0850E850[];
+
+void sub_8097D68(struct Sprite *sprite);
+void sub_8097FE4(u8);
+
+bool8 FreezeMapObject(struct MapObject *mapObject)
+{
+    if (mapObject->mapobj_bit_6 || mapObject->mapobj_bit_8)
+    {
+        return TRUE;
+    }
+    else
+    {
+        mapObject->mapobj_bit_8 = 1;
+        mapObject->mapobj_bit_23 = gSprites[mapObject->spriteId].animPaused;
+        mapObject->mapobj_bit_24 = gSprites[mapObject->spriteId].affineAnimPaused;
+        gSprites[mapObject->spriteId].animPaused = 1;
+        gSprites[mapObject->spriteId].affineAnimPaused = 1;
+        return FALSE;
+    }
+}
+
+void FreezeMapObjects(void)
+{
+    u8 i;
+    for (i = 0; i < MAP_OBJECTS_COUNT; i++)
+        if (gMapObjects[i].active && i != gPlayerAvatar.mapObjectId)
+            FreezeMapObject(&gMapObjects[i]);
+}
+
+void FreezeMapObjectsExceptOne(u8 a1)
+{
+    u8 i;
+    for (i = 0; i < MAP_OBJECTS_COUNT; i++)
+        if (i != a1 && gMapObjects[i].active && i != gPlayerAvatar.mapObjectId)
+            FreezeMapObject(&gMapObjects[i]);
+}
+
+void npc_sync_anim_pause_bits(struct MapObject *mapObject)
+{
+    if (mapObject->active && mapObject->mapobj_bit_8)
+    {
+        mapObject->mapobj_bit_8 = 0;
+        gSprites[mapObject->spriteId].animPaused = mapObject->mapobj_bit_23;
+        gSprites[mapObject->spriteId].affineAnimPaused = mapObject->mapobj_bit_24;
+    }
+}
+
+void UnfreezeMapObjects(void)
+{
+    u8 i;
+    for (i = 0; i < MAP_OBJECTS_COUNT; i++)
+        if (gMapObjects[i].active)
+            npc_sync_anim_pause_bits(&gMapObjects[i]);
+}
+
+void little_step(struct Sprite *sprite, u8 dir)
+{
+    sprite->pos1.x += gUnknown_0850DB7C[dir].x;
+    sprite->pos1.y += gUnknown_0850DB7C[dir].y;
+}
+
+void double_little_steps(struct Sprite *sprite, u8 dir)
+{
+    sprite->pos1.x += 2 * (u16) gUnknown_0850DB7C[dir].x;
+    sprite->pos1.y += 2 * (u16) gUnknown_0850DB7C[dir].y;
+}
+
+void triple_little_steps(struct Sprite *sprite, u8 dir)
+{
+    sprite->pos1.x += 2 * (u16) gUnknown_0850DB7C[dir].x + (u16) gUnknown_0850DB7C[dir].x;
+    sprite->pos1.y += 2 * (u16) gUnknown_0850DB7C[dir].y + (u16) gUnknown_0850DB7C[dir].y;
+}
+
+void quad_little_steps(struct Sprite *sprite, u8 dir)
+{
+    sprite->pos1.x += 4 * (u16) gUnknown_0850DB7C[dir].x;
+    sprite->pos1.y += 4 * (u16) gUnknown_0850DB7C[dir].y;
+}
+
+void oct_little_steps(struct Sprite *sprite, u8 dir)
+{
+    sprite->pos1.x += 8 * (u16) gUnknown_0850DB7C[dir].x;
+    sprite->pos1.y += 8 * (u16) gUnknown_0850DB7C[dir].y;
+}
+
+void oamt_npc_ministep_reset(struct Sprite *sprite, u8 a2, u8 a3)
+{
+    sprite->data[3] = a2;
+    sprite->data[4] = a3;
+    sprite->data[5] = 0;
+}
+
+bool8 obj_npc_ministep(struct Sprite *sprite)
+{
+    if (sprite->data[5] >= gUnknown_0850E768[sprite->data[4]])
+        return FALSE;
+
+    gUnknown_0850E754[sprite->data[4]][sprite->data[5]](sprite, sprite->data[3]);
+
+    sprite->data[5]++;
+
+    if (sprite->data[5] < gUnknown_0850E768[sprite->data[4]])
+        return FALSE;
+
+    return TRUE;
+}
+
+void sub_80976DC(struct Sprite *sprite, u8 a2)
+{
+    sprite->data[3] = a2;
+    sprite->data[4] = 0;
+    sprite->data[5] = 0;
+}
+
+bool8 sub_80976EC(struct Sprite *sprite)
+{
+    if (!(sprite->data[4] & 1))
+    {
+        little_step(sprite, sprite->data[3]);
+        sprite->data[5]++;
+    }
+
+    sprite->data[4]++;
+
+    if (sprite->data[5] > 15)
+        return TRUE;
+    else
+        return FALSE;
+}
+
+// new helper added here in the middle. Perhaps Game Freak kept these organized in alphebetical order or some other heirarchy?
+
+s16 sub_8097728(s16 a1)
+{
+    return gUnknown_0850E7BA[a1];
+}
+
+s16 sub_809773C(s16 a1)
+{
+    return gUnknown_0850E772[a1];
+}
+
+void sub_8097750(struct Sprite *sprite)
+{
+    sprite->data[6] = 0;
+    sprite->data[7] = 0;
+}
+
+bool8 sub_8097758(struct Sprite *sprite)
+{
+    bool8 result = FALSE;
+
+    switch(sprite->data[7])
+    {
+        case 0:
+            sprite->pos2.x += sub_809773C(sprite->data[6]);
+            sprite->pos2.y += sub_8097728(sprite->data[6]);
+            break;
+        case 1:
+            sprite->pos2.x -= sub_809773C(0x47 - sprite->data[6]);
+            sprite->pos2.y += sub_8097728(0x47 - sprite->data[6]);
+            break;
+        case 2:
+            sprite->pos2.x -= sub_809773C(sprite->data[6]);
+            sprite->pos2.y += sub_8097728(sprite->data[6]);
+            break;
+        case 3:
+            sprite->pos2.x += sub_809773C(0x47 - sprite->data[6]);
+            sprite->pos2.y += sub_8097728(0x47 - sprite->data[6]);
+            break;
+    }
+    if(++sprite->data[6] == 0x48)
+    {
+        sprite->data[6] = 0;
+        sprite->data[7]++;
+    }
+    if(sprite->data[7] == 0x4)
+    {
+        sprite->pos2.y = 0;
+        sprite->pos2.x = 0;
+        result = TRUE;
+    }
+    return result;
+}
+
+s16 sub_8097820(s16 a1, u8 a2)
+{
+    return gUnknown_0850E834[a2][a1];
+}
+
+void sub_809783C(struct Sprite *sprite, u8 a2, u8 a3, u8 a4)
+{
+    sprite->data[3] = a2;
+    sprite->data[4] = a3;
+    sprite->data[5] = a4;
+    sprite->data[6] = 0;
+}
+
+u8 sub_809785C(struct Sprite *sprite)
+{
+    s16 v5[3];
+    u8 v6[3];
+    u8 v2;
+
+    memcpy(v5, gUnknown_0850E840, 6); // TODO: get rid of memcpy
+    memcpy(v6, gUnknown_0850E846, 3);
+    v2 = 0;
+
+    if (sprite->data[4])
+        little_step(sprite, sprite->data[3]);
+
+    sprite->pos2.y = sub_8097820(sprite->data[6] >> v6[sprite->data[4]], sprite->data[5]);
+
+    sprite->data[6]++;
+
+    if (sprite->data[6] == (v5[sprite->data[4]] >> 1))
+        v2 = 1;
+
+    if (sprite->data[6] >= v5[sprite->data[4]])
+    {
+        sprite->pos2.y = 0;
+        v2 = -1;
+    }
+
+    return v2;
+}
+
+u8 sub_80978E4(struct Sprite *sprite)
+{
+    s16 v5[3];
+    u8 v6[3];
+    u8 v2;
+
+    memcpy(v5, gUnknown_0850E84A, 6);
+    memcpy(v6, gUnknown_0850E850, 3);
+    v2 = 0;
+
+    if (sprite->data[4] && !(sprite->data[6] & 1))
+        little_step(sprite, sprite->data[3]);
+
+    sprite->pos2.y = sub_8097820(sprite->data[6] >> v6[sprite->data[4]], sprite->data[5]);
+
+    sprite->data[6]++;
+
+    if (sprite->data[6] == (v5[sprite->data[4]] >> 1))
+        v2 = 1;
+
+    if (sprite->data[6] >= v5[sprite->data[4]])
+    {
+        sprite->pos2.y = 0;
+        v2 = -1;
+    }
+
+    return v2;
+}
+
+void SetFieldObjectStepTimer(struct Sprite *sprite, u16 timer)
+{
+    sprite->data[3] = timer;
+}
+
+
+bool8 RunFieldObjectStepTimer(struct Sprite *sprite)
+{
+    sprite->data[3]--;
+
+    if (sprite->data[3] == 0)
+        return TRUE;
+    else
+        return FALSE;
+}
+
+void obj_anim_image_set_and_seek(struct Sprite *sprite, u8 a2, u8 a3)
+{
+    sprite->animNum = a2;
+    sprite->animPaused = 0 ;
+    SeekSpriteAnim(sprite, a3);
+}
+
+bool8 sub_80979BC(struct Sprite *sprite)
+{
+    if (sprite->animEnded)
+        return TRUE;
+    else
+        return FALSE;
+}
+
+void sub_80979D4(struct Sprite *sprite, bool8 invisible)
+{
+    u16 x, y;
+    s16 x2, y2;
+
+    sprite->invisible = invisible;
+
+    if (sprite->coordOffsetEnabled)
+    {
+        x = sprite->pos1.x + sprite->pos2.x + sprite->centerToCornerVecX + gSpriteCoordOffsetX;
+        y = sprite->pos1.y + sprite->pos2.y + sprite->centerToCornerVecY + gSpriteCoordOffsetY;
+    }
+    else
+    {
+        x = sprite->pos1.x + sprite->pos2.x + sprite->centerToCornerVecX;
+        y = sprite->pos1.y + sprite->pos2.y + sprite->centerToCornerVecY;
+    }
+
+    x2 = x - (sprite->centerToCornerVecX >> 1);
+    y2 = y - (sprite->centerToCornerVecY >> 1);
+
+    if ((s16)x > 255 || x2 < -16)
+        sprite->invisible = 1;
+    if ((s16)y > 175 || y2 < -16)
+        sprite->invisible = 1;
+}
+
+void sub_8097AC8(struct Sprite *sprite)
+{
+    sub_8097D68(sprite);
+    SetObjectSubpriorityByZCoord(sprite->data[1], sprite, 1);
+    sub_80979D4(sprite, sprite->data[2]);
+}
+
+void sub_8097AF0(void)
+{
+    int i;
+
+    for(i = 0; i < MAX_SPRITES; i++)
+    {
+        struct Sprite *sprite = &gSprites[i];
+        if(sprite->inUse && sprite->callback == sub_8097AC8)
+            DestroySprite(sprite);
+    }
+}
+
+int sub_8097B2C(u8 var) // this should return a u8, because all that call this shifts to u8, but it wont match because it doesnt shift u8 at the end.
+{
+    int i;
+
+    for(i = 0; i < MAX_SPRITES; i++)
+    {
+        struct Sprite *sprite = &gSprites[i];
+        if(sprite->inUse && sprite->callback == sub_8097AC8 && (u8)sprite->data[0] == var)
+            return i;
+    }
+    return MAX_SPRITES;
+}
+
+void sub_8097B78(u8 var1, u8 var2)
+{
+    u8 spriteId = sub_8097B2C(var1);
+
+    if(spriteId != MAX_SPRITES)
+        StartSpriteAnim(&gSprites[spriteId], FieldObjectDirectionToImageAnimId(var2));
+}
+
+void sub_8097BB4(u8 var1, u8 var2)
+{
+    int spriteId = sub_8097B2C(var1);
+
+    if(spriteId != MAX_SPRITES)
+    {
+        struct Sprite *sprite = &gSprites[spriteId];
+        const struct MapObjectGraphicsInfo *gfxInfo = GetFieldObjectGraphicsInfo(var2);
+        u16 tileNum = sprite->oam.tileNum;
+
+        sprite->oam = *gfxInfo->oam;
+        sprite->oam.tileNum = tileNum;
+        sprite->oam.paletteNum = gfxInfo->paletteSlot;
+        sprite->images = gfxInfo->images;
+
+        if(gfxInfo->subspriteTables == NULL)
+        {
+            sprite->subspriteTables = NULL;
+            sprite->subspriteTableNum = 0;
+            sprite->subspriteMode = 0;
+        }
+        else
+        {
+            SetSubspriteTables(sprite, gfxInfo->subspriteTables);
+            sprite->subspriteMode = 2;
+        }
+        StartSpriteAnim(sprite, 0);
+    }
+}
+
+void sub_8097C44(u8 var, bool32 var2)
+{
+    u8 spriteId = sub_8097B2C(var);
+
+    if(spriteId == MAX_SPRITES)
+        return;
+
+    if(var2)
+        gSprites[spriteId].data[2] = 1;
+    else
+        gSprites[spriteId].data[2] = 0;
+}
+
+bool32 sub_8097C8C(u8 var)
+{
+    u8 spriteId = sub_8097B2C(var);
+
+    if(spriteId == MAX_SPRITES)
+        return FALSE;
+
+    return (gSprites[spriteId].data[2] == TRUE);
+}
+
+void sub_8097CC4(u8 var1, u8 var2)
+{
+    u8 spriteId = sub_8097B2C(var1);
+
+    if(spriteId != MAX_SPRITES)
+    {
+        gSprites[spriteId].data[3] = var2;
+        gSprites[spriteId].data[4] = 0;
+    }
+}
+
+void sub_8097CF4(struct Sprite *sprite)
+{
+    switch(sprite->data[4])
+    {
+        case 0:
+            sprite->pos2.y = 0;
+            sprite->data[4]++;
+        case 1:
+            sprite->pos2.y -= 8;
+            if(sprite->pos2.y == -160)
+            {
+                sprite->pos2.y = 0;
+                sprite->data[2] = 1;
+                sprite->data[3] = 0;
+                sprite->data[4] = 0;
+            }
+    }
+}
+
+void sub_8097D30(struct Sprite *sprite)
+{
+    switch(sprite->data[4])
+    {
+        case 0:
+            sprite->pos2.y = -160;
+            sprite->data[4]++;
+        case 1:
+            sprite->pos2.y += 8;
+            if(sprite->pos2.y == 0)
+            {
+                sprite->data[3] = 0;
+                sprite->data[4] = 0;
+            }
+    }
+}
+
+void sub_8097D68(struct Sprite *sprite)
+{
+    switch(sprite->data[3])
+    {
+        case 1:
+            sub_8097D30(sprite);
+            break;
+        case 2:
+            sub_8097CF4(sprite);
+            break;
+        case 0:
+            break;
+        default:
+            sprite->data[3] = 0;
+            break;
+    }
+}
+
+bool32 sub_8097D9C(u8 var)
+{
+    u8 spriteId = sub_8097B2C(var);
+
+    if(spriteId == MAX_SPRITES)
+        return FALSE;
+
+    if(gSprites[spriteId].data[3] != FALSE)
+        return TRUE;
+
+    return FALSE;
+}
+
+u32 oe_exec_and_other_stuff(u8 fieldEffectId, struct MapObject *mapObject)
+{
+    FieldObjectGetLocalIdAndMap(mapObject, &gFieldEffectArguments[0], &gFieldEffectArguments[1], &gFieldEffectArguments[2]);
+    return FieldEffectStart(fieldEffectId);
+}
+
+void DoShadowFieldEffect(struct MapObject *mapObject)
+{
+    if (!mapObject->mapobj_bit_22)
+    {
+        mapObject->mapobj_bit_22 = 1;
+        oe_exec_and_other_stuff(FLDEFF_SHADOW, mapObject);
+    }
+}
+
+void DoRippleFieldEffect(struct MapObject *mapObject, struct Sprite *sprite)
+{
+    const struct MapObjectGraphicsInfo *gfxInfo = GetFieldObjectGraphicsInfo(mapObject->graphicsId);
+    gFieldEffectArguments[0] = sprite->pos1.x;
+    gFieldEffectArguments[1] = sprite->pos1.y + (gfxInfo->height >> 1) - 2;
+    gFieldEffectArguments[2] = 151;
+    gFieldEffectArguments[3] = 3;
+    FieldEffectStart(FLDEFF_RIPPLE);
+}
+
+#ifdef NONMATCHING
+bool32 sub_8097E50(struct MapObject *mapObject, struct Sprite *sprite)
+{
+    bool32 ableToStore = FALSE;
+    if (gUnknown_020375B8 == NULL)
+    {
+        gUnknown_020375B8 = AllocZeroed(0x14);
+        gUnknown_020375B8[0] = mapObject->localId;
+        gUnknown_020375B8[16] = 1;
+        ableToStore = TRUE;
+    }
+    else
+    {
+        u8 i;
+        u8 firstFreeSlot;
+        bool32 found;
+        for (firstFreeSlot = 16, found = FALSE, i = 0; i < 16; i++)
+        {
+            if (firstFreeSlot == 16 && gUnknown_020375B8[i] == 0)
+                firstFreeSlot = i;
+            
+            if (gUnknown_020375B8[i] == mapObject->localId)
+            {
+                found = TRUE;
+                break;
+            }
+        }
+        
+        if (!found && firstFreeSlot != 16)
+        {
+            gUnknown_020375B8[firstFreeSlot] = mapObject->localId;
+            gUnknown_020375B8[16]++;
+            ableToStore = TRUE; // the nonmatching problem is that ableToStore == TRUE isnt being merged with the above ableToStore = TRUE assignment.
+        }
+    }
+    
+    if (ableToStore == TRUE)
+    {
+        mapObject->mapobj_bit_12 = TRUE;
+        mapObject->mapobj_bit_9 = TRUE;
+    }
+    
+    sprite->data[2] = 1;
+    return TRUE;
+}
+#else
+__attribute__((naked))
+bool32 sub_8097E50(struct MapObject *mapObject, struct Sprite *sprite)
+{
+    asm(".syntax unified\n\
+    push {r4-r7,lr}\n\
+    mov r7, r8\n\
+    push {r7}\n\
+    adds r4, r0, 0\n\
+    mov r8, r1\n\
+    movs r0, 0\n\
+    mov r12, r0\n\
+    ldr r0, =gUnknown_020375B8\n\
+    ldr r1, [r0]\n\
+    adds r6, r0, 0\n\
+    cmp r1, 0\n\
+    bne _08097E80\n\
+    movs r0, 0x14\n\
+    bl AllocZeroed\n\
+    str r0, [r6]\n\
+    ldrb r1, [r4, 0x8]\n\
+    strb r1, [r0]\n\
+    ldr r1, [r6]\n\
+    movs r0, 0x1\n\
+    strb r0, [r1, 0x10]\n\
+    b _08097ECC\n\
+    .pool\n\
+_08097E80:\n\
+    movs r2, 0x10\n\
+    movs r5, 0\n\
+    movs r1, 0\n\
+    adds r3, r6, 0\n\
+    b _08097E90\n\
+_08097E8A:\n\
+    adds r0, r1, 0x1\n\
+    lsls r0, 24\n\
+    lsrs r1, r0, 24\n\
+_08097E90:\n\
+    cmp r1, 0xF\n\
+    bhi _08097EB2\n\
+    cmp r2, 0x10\n\
+    bne _08097EA4\n\
+    ldr r0, [r3]\n\
+    adds r0, r1\n\
+    ldrb r0, [r0]\n\
+    cmp r0, 0\n\
+    bne _08097EA4\n\
+    adds r2, r1, 0\n\
+_08097EA4:\n\
+    ldr r0, [r3]\n\
+    adds r0, r1\n\
+    ldrb r0, [r0]\n\
+    ldrb r7, [r4, 0x8]\n\
+    cmp r0, r7\n\
+    bne _08097E8A\n\
+    movs r5, 0x1\n\
+_08097EB2:\n\
+    cmp r5, 0\n\
+    bne _08097ECE\n\
+    cmp r2, 0x10\n\
+    beq _08097ECE\n\
+    ldr r0, [r6]\n\
+    adds r0, r2\n\
+    ldrb r1, [r4, 0x8]\n\
+    strb r1, [r0]\n\
+    ldr r1, [r6]\n\
+    ldrb r0, [r1, 0x10]\n\
+    adds r0, 0x1\n\
+    strb r0, [r1, 0x10]\n\
+    movs r0, 0x1\n\
+_08097ECC:\n\
+    mov r12, r0\n\
+_08097ECE:\n\
+    mov r1, r12\n\
+    cmp r1, 0x1\n\
+    bne _08097EE0\n\
+    ldrb r0, [r4, 0x1]\n\
+    movs r1, 0x10\n\
+    orrs r0, r1\n\
+    movs r1, 0x2\n\
+    orrs r0, r1\n\
+    strb r0, [r4, 0x1]\n\
+_08097EE0:\n\
+    movs r0, 0x1\n\
+    mov r7, r8\n\
+    strh r0, [r7, 0x32]\n\
+    pop {r3}\n\
+    mov r8, r3\n\
+    pop {r4-r7}\n\
+    pop {r1}\n\
+    bx r1\n\
+    .syntax divided");
+}
+#endif
+
+// this function is very similar to the above one and I don't want to decompile this one until the above is matching.
+__attribute__((naked))
+bool32 sub_8097EF0(struct MapObject *mapObject, struct Sprite *sprite)
+{
+    asm(".syntax unified\n\
+    push {r4-r7,lr}\n\
+    mov r7, r8\n\
+    push {r7}\n\
+    adds r6, r0, 0\n\
+    mov r8, r1\n\
+    movs r0, 0x1\n\
+    strh r0, [r1, 0x32]\n\
+    ldr r5, =gUnknown_020375B8\n\
+    ldr r0, [r5]\n\
+    cmp r0, 0\n\
+    beq _08097F68\n\
+    movs r7, 0\n\
+    adds r0, r6, 0\n\
+    bl sub_8097F78\n\
+    lsls r0, 24\n\
+    lsrs r1, r0, 24\n\
+    cmp r1, 0x10\n\
+    beq _08097F28\n\
+    ldr r0, [r5]\n\
+    adds r0, r1\n\
+    movs r1, 0\n\
+    strb r1, [r0]\n\
+    ldr r1, [r5]\n\
+    ldrb r0, [r1, 0x10]\n\
+    subs r0, 0x1\n\
+    strb r0, [r1, 0x10]\n\
+    movs r7, 0x1\n\
+_08097F28:\n\
+    ldr r0, [r5]\n\
+    ldrb r4, [r0, 0x10]\n\
+    cmp r4, 0\n\
+    bne _08097F36\n\
+    bl Free\n\
+    str r4, [r5]\n\
+_08097F36:\n\
+    cmp r7, 0x1\n\
+    bne _08097F68\n\
+    ldrb r0, [r6, 0x5]\n\
+    bl GetFieldObjectGraphicsInfo\n\
+    ldrb r1, [r0, 0xC]\n\
+    lsls r1, 25\n\
+    lsrs r1, 31\n\
+    lsls r1, 4\n\
+    ldrb r2, [r6, 0x1]\n\
+    movs r0, 0x11\n\
+    negs r0, r0\n\
+    ands r0, r2\n\
+    orrs r0, r1\n\
+    movs r1, 0x3\n\
+    negs r1, r1\n\
+    ands r0, r1\n\
+    strb r0, [r6, 0x1]\n\
+    mov r2, r8\n\
+    adds r2, 0x2C\n\
+    ldrb r1, [r2]\n\
+    movs r0, 0x41\n\
+    negs r0, r0\n\
+    ands r0, r1\n\
+    strb r0, [r2]\n\
+_08097F68:\n\
+    movs r0, 0x1\n\
+    pop {r3}\n\
+    mov r8, r3\n\
+    pop {r4-r7}\n\
+    pop {r1}\n\
+    bx r1\n\
+    .pool\n\
+    .syntax divided");
+}
+
+u8 sub_8097F78(struct MapObject *mapObject)
+{
+    u8 i;
+
+    for(i = 0; i < MAP_OBJECTS_COUNT; i++)
+    {
+        if(gUnknown_020375B8[i] == mapObject->localId)
+            return i;
+    }
+    return MAP_OBJECTS_COUNT;
+}
+
+void sub_8097FA4(struct MapObject *mapObject)
+{
+    u8 taskId = CreateTask(sub_8097FE4, 0xFF);
+    struct Task *task = &gTasks[taskId];
+
+    StoreWordInTwoHalfwords(&task->data[0], (u32)mapObject);
+    mapObject->mapobj_unk_1B = taskId;
+    task->data[3] = 0xFFFF;
+}
+
+void sub_8097FE4(u8 taskId)
+{
+    struct MapObject *mapObject;
+    struct Sprite *sprite;
+    struct Task *task = &gTasks[taskId];
+
+    LoadWordFromTwoHalfwords(&task->data[0], (u32 *)&mapObject); // load the map object pointer.
+    sprite = &gSprites[mapObject->spriteId];
+
+    if(!(task->data[2] & 0x3))
+        sprite->pos2.y += task->data[3];
+
+    if(!(task->data[2] & 0xF))
+        task->data[3] = -task->data[3];
+
+    task->data[2]++;
+}
+
+void sub_8098044(u8 taskId)
+{
+    u32 word;
+    struct Task *task = &gTasks[taskId];
+
+    LoadWordFromTwoHalfwords(&task->data[0], &word); // huh??? why does it load a word that never gets used???
+    DestroyTask(taskId);
+}
+
+void sub_8098074(u8 var1, u8 var2)
+{
+    u8 i;
+
+    for(i = 0; i < MAP_OBJECTS_COUNT; i++)
+    {
+        if(i != var1 && i != var2 &&
+            gMapObjects[i].active && i != gPlayerAvatar.mapObjectId)
+                FreezeMapObject(&gMapObjects[i]);
+    }
+}
+
+bool32 sub_80980C0(struct MapObject *mapObject, struct Sprite *sprite)
+{
+    sprite->pos2.y = 0;
+    sprite->data[2]++;
+    return FALSE;
+}
+
+bool32 sub_80980D0(struct MapObject *mapObject, struct Sprite *sprite)
+{
+    sprite->pos2.y -= 8;
+
+    if(sprite->pos2.y == -160)
+        sprite->data[2]++;
+    return FALSE;
+}
+
+bool32 sub_80980F4(struct MapObject *mapObject, struct Sprite *sprite)
+{
+    sprite->pos2.y = -160;
+    sprite->data[2]++;
+    return FALSE;
+}
+
+bool32 sub_8098108(struct MapObject *mapObject, struct Sprite *sprite)
+{
+    sprite->pos2.y += 8;
+
+    if(!sprite->pos2.y)
+        sprite->data[2]++;
+    return FALSE;
+}
+
+// though this function returns TRUE without doing anything, this header is required due to being in an array of functions which needs it.
+bool32 sub_8098124(struct MapObject *mapObject, struct Sprite *sprite)
+{
+    return TRUE;
+}

src/field_message_box.c

@@ -0,0 +1,154 @@
+#include "global.h"
+#include "new_menu_helpers.h"
+#include "string.h"
+#include "string_util.h"
+#include "task.h"
+#include "text.h"
+
+EWRAM_DATA u8 gUnknown_020375BC = 0;
+
+void textbox_fdecode_auto_and_task_add(u8*, int);
+void textbox_auto_and_task_add(void);
+
+void sub_8098128(void)
+{
+    gUnknown_020375BC = 0;
+    gTextFlags.flag_0 = 0;
+    gTextFlags.flag_1 = 0;
+    gTextFlags.flag_2 = 0;
+    gTextFlags.flag_3 = 0;
+}
+
+void sub_8098154(u8 taskId)
+{
+    struct Task *task = &gTasks[taskId];
+    
+    switch (task->data[0])
+    {
+        case 0:
+           sub_81973A4();
+           task->data[0]++;
+           break;
+        case 1:
+           sub_81973C4(0, 1);
+           task->data[0]++;
+           break;
+        case 2:
+            if (sub_8197224() != 1)
+            {
+                gUnknown_020375BC = 0;
+                DestroyTask(taskId);
+            }
+    }
+}
+
+void task_add_textbox(void)
+{
+    CreateTask(sub_8098154, 0x50);
+}
+
+void task_del_textbox(void)
+{
+    u8 taskId = FindTaskIdByFunc(sub_8098154);
+    if (taskId != 0xFF)
+        DestroyTask(taskId);
+}
+
+bool8 ShowFieldMessage(u8 *str)
+{
+    if (gUnknown_020375BC != 0)
+        return FALSE;
+    textbox_fdecode_auto_and_task_add(str, 1);
+    gUnknown_020375BC = 2;
+    return TRUE; 
+}
+
+void sub_8098214(u8 taskId)
+{
+    if (sub_8196094() == 0)
+    {
+        gUnknown_020375BC = 0;
+        DestroyTask(taskId);
+    }
+}
+
+bool8 sub_8098238(u8 *str)
+{
+    if (gUnknown_020375BC != 0)
+        return FALSE;
+    StringExpandPlaceholders(gStringVar4, str);
+    CreateTask(sub_8098214, 0);
+    sub_8196080(str);
+    gUnknown_020375BC = 2;
+    return TRUE;
+}
+
+bool8 ShowFieldAutoScrollMessage(u8 *str)
+{
+    if (gUnknown_020375BC != 0)
+        return FALSE;
+    gUnknown_020375BC = 3;
+    textbox_fdecode_auto_and_task_add(str, 0);
+    return TRUE;
+}
+
+bool8 sub_80982A0(u8 *str)
+{
+    gUnknown_020375BC = 3;
+    textbox_fdecode_auto_and_task_add(str, 1);
+    return TRUE;
+}
+
+bool8 sub_80982B8(void)
+{
+    if (gUnknown_020375BC != 0)
+        return FALSE;
+    gUnknown_020375BC = 2;
+    textbox_auto_and_task_add();
+    return TRUE;
+}
+
+void textbox_fdecode_auto_and_task_add(u8* str, int a)
+{
+    StringExpandPlaceholders(gStringVar4, str);
+    AddTextPrinterForMessage(a);
+    task_add_textbox();
+}
+
+void textbox_auto_and_task_add(void)
+{
+    AddTextPrinterForMessage(1);
+    task_add_textbox();
+}
+
+void HideFieldMessageBox(void)
+{
+    task_del_textbox();
+    sub_8197434(0, 1);
+    gUnknown_020375BC = 0;
+}
+
+u8 textbox_any_visible(void)
+{
+    return gUnknown_020375BC;
+}
+
+bool8 IsFieldMessageBoxHidden(void)
+{
+    if (gUnknown_020375BC == 0)
+        return TRUE;
+    return FALSE;
+}
+
+void sub_8098358(void)
+{
+    task_del_textbox();
+    sub_81973FC(0, 1);
+    gUnknown_020375BC = 0;
+}
+
+void sub_8098374(void)
+{
+    task_del_textbox();
+    gUnknown_020375BC = 0;
+}

src/item_use.c

@@ -15,7 +15,7 @@
 #include "field_screen.h"
 #include "field_weather.h"
 #include "item.h"
-#include "map_obj_8097404.h"
+#include "field_map_obj_helpers.h"
 #include "mail.h"
 #include "metatile_behavior.h"
 #include "overworld.h"

src/mystery_event_menu.c

@@ -0,0 +1,303 @@
+#include "global.h"
+#include "mystery_event_menu.h"
+#include "link.h"
+#include "main.h"
+#include "menu.h"
+#include "mystery_event_script.h"
+#include "palette.h"
+#include "save.h"
+#include "constants/songs.h"
+#include "sound.h"
+#include "sprite.h"
+#include "string_util.h"
+#include "strings.h"
+#include "task.h"
+#include "text.h"
+#include "bg.h"
+#include "window.h"
+#include "gpu_regs.h"
+#include "text_window.h"
+#include "new_menu_helpers.h"
+#include "decompress.h"
+
+// this file's functions
+static void CB2_MysteryEventMenu(void);
+static void PrintMysteryMenuText(u8 windowId, const u8 *text, u8 x, u8 y, s32 speed);
+
+// EWRAM vars
+static EWRAM_DATA u8 sUnknown_0203BCF8 = 0; // set but unused
+
+// const rom data
+static const struct BgTemplate sBgTemplates[] =
+{
+    {
+        .bg = 0,
+        .charBaseIndex = 2,
+        .mapBaseIndex = 31,
+        .screenSize = 0,
+        .paletteMode = 0,
+        .priority = 0,
+        .baseTile = 0
+    }
+};
+
+static const struct WindowTemplate sWindowTemplates[] =
+{
+    {0, 4, 15, 22, 4, 14, 20},
+    {0, 7, 6, 16, 4, 14, 0x6C},
+    DUMMY_WIN_TEMPLATE
+};
+
+// code
+static void VBlankCB(void)
+{
+    LoadOam();
+    ProcessSpriteCopyRequests();
+    TransferPlttBuffer();
+}
+
+static bool8 CheckLanguageMatch(void)
+{
+    return (gLinkPlayers[0].language == gLinkPlayers[1].language);
+}
+
+void CB2_InitMysteryEventMenu(void)
+{
+    ResetSpriteData();
+    FreeAllSpritePalettes();
+    ResetTasks();
+    SetVBlankCallback(VBlankCB);
+    ResetBgsAndClearDma3BusyFlags(0);
+    InitBgsFromTemplates(0, sBgTemplates, ARRAY_COUNT(sBgTemplates));
+    if (InitWindows(sWindowTemplates))
+    {
+        s32 i;
+
+        DeactivateAllTextPrinters();
+        for (i = 0; i < 2; i++)
+            FillWindowPixelBuffer(i, 0);
+
+        FillBgTilemapBufferRect_Palette0(0, 0, 0, 0, 0x1E, 0x14);
+        sub_809882C(0, 1u, 0xD0u);
+        sub_81978B0(0xE0);
+        SetGpuReg(REG_OFFSET_DISPCNT, DISPCNT_MODE_0 | DISPCNT_OBJ_1D_MAP | DISPCNT_BG0_ON);
+        SetGpuReg(REG_OFFSET_BLDCNT, 0);
+        CreateTask(Task_DestroySelf, 0);
+        StopMapMusic();
+        RunTasks();
+        AnimateSprites();
+        BuildOamBuffer();
+        RunTextPrinters();
+        UpdatePaletteFade();
+        FillPalette(0, 0, 2);
+        SetMainCallback2(CB2_MysteryEventMenu);
+    }
+}
+
+static bool8 GetEventLoadMessage(u8 *dest, u32 status)
+{
+    bool8 retVal = TRUE;
+
+    if (status == 0)
+    {
+        StringCopy(dest, gText_EventSafelyLoaded);
+        retVal = FALSE;
+    }
+
+    if (status == 2)
+        retVal = FALSE;
+
+    if (status == 1)
+        StringCopy(dest, gText_LoadErrorEndingSession);
+
+    return retVal;
+}
+
+static void CB2_MysteryEventMenu(void)
+{
+    switch (gMain.state)
+    {
+    case 0:
+        SetWindowBorderStyle(0, 1, 1, 0xD);
+        PutWindowTilemap(0);
+        CopyWindowToVram(0, 3);
+        ShowBg(0);
+        BeginNormalPaletteFade(-1, 0, 0x10, 0, 0);
+        gMain.state++;
+        break;
+    case 1:
+        if (!gPaletteFade.active)
+        {
+            PrintMysteryMenuText(0, gText_LinkStandby2, 1, 2, 1);
+            gMain.state++;
+        }
+        break;
+    case 2:
+        if (!IsTextPrinterActive(0))
+        {
+            gMain.state++;
+            gLinkType = 21761;
+            OpenLink();
+        }
+        break;
+    case 3:
+        if ((gLinkStatus & 0x20) && (gLinkStatus & 0x1C) > 4)
+        {
+            PlaySE(SE_PIN);
+            PrintMysteryMenuText(0, gText_PressAToLoadEvent, 1, 2, 1);
+            gMain.state++;
+        }
+        if (gMain.newKeys & B_BUTTON)
+        {
+            PlaySE(SE_SELECT);
+            CloseLink();
+            gMain.state = 15;
+        }
+        break;
+    case 4:
+        if (!IsTextPrinterActive(0))
+            gMain.state++;
+        break;
+    case 5:
+        if (GetLinkPlayerCount_2() == 2)
+        {
+            if (gMain.newKeys & A_BUTTON)
+            {
+                PlaySE(SE_SELECT);
+                sub_800A620();
+                SetWindowBorderStyle(1, 1, 1, 0xD);
+                PrintMysteryMenuText(1, gText_LoadingEvent, 1, 2, 0);
+                PutWindowTilemap(1);
+                CopyWindowToVram(1, 3);
+                gMain.state++;
+            }
+            else if (gMain.newKeys & B_BUTTON)
+            {
+                PlaySE(SE_SELECT);
+                CloseLink();
+                gMain.state = 15;
+            }
+        }
+        else
+        {
+            GetEventLoadMessage(gStringVar4, 1);
+            PrintMysteryMenuText(0, gStringVar4, 1, 2, 1);
+            gMain.state = 13;
+        }
+        break;
+    case 6:
+        if (IsLinkConnectionEstablished())
+        {
+            if (gReceivedRemoteLinkPlayers != 0)
+            {
+                if (sub_800A0C8(2, 2) == 3)
+                {
+                    sub_800AC34();
+                    GetEventLoadMessage(gStringVar4, 1);
+                    PrintMysteryMenuText(0, gStringVar4, 1, 2, 1);
+                    gMain.state = 13;
+                }
+                else if (CheckLanguageMatch())
+                {
+                    PrintMysteryMenuText(0, gText_DontRemoveCableTurnOff, 1, 2, 1);
+                    gMain.state++;
+                }
+                else
+                {
+                    CloseLink();
+                    GetEventLoadMessage(gStringVar4, 1);
+                    PrintMysteryMenuText(0, gStringVar4, 1, 2, 1);
+                    gMain.state = 13;
+                }
+            }
+        }
+        else if (gMain.newKeys & B_BUTTON)
+        {
+            PlaySE(SE_SELECT);
+            CloseLink();
+            gMain.state = 15;
+        }
+        break;
+    case 7:
+        if (!IsTextPrinterActive(0))
+            gMain.state++;
+        break;
+    case 8:
+        if (GetBlockReceivedStatus())
+        {
+            ResetBlockReceivedFlags();
+            gMain.state++;
+        }
+        break;
+    case 9:
+        gMain.state++;
+        break;
+    case 10:
+        sub_800AC34();
+        gMain.state++;
+        break;
+    case 11:
+        if (gReceivedRemoteLinkPlayers == 0)
+        {
+            u16 unkVal = RunMysteryEventScript(gDecompressionBuffer);
+            CpuFill32(0, gDecompressionBuffer, 0x7D4);
+            if (!GetEventLoadMessage(gStringVar4, unkVal))
+                TrySavingData(NORMAL_SAVE);
+            gMain.state++;
+        }
+        break;
+    case 12:
+        PrintMysteryMenuText(0, gStringVar4, 1, 2, 1);
+        gMain.state++;
+        break;
+    case 13:
+        if (!IsTextPrinterActive(0))
+        {
+            gMain.state++;
+            sUnknown_0203BCF8 = 0;
+        }
+        break;
+    case 14:
+        if (gMain.newKeys & A_BUTTON)
+        {
+            PlaySE(SE_SELECT);
+            gMain.state++;
+        }
+        break;
+    case 15:
+        BeginNormalPaletteFade(-1, 0, 0, 0x10, 0);
+        gMain.state++;
+        break;
+    case 16:
+        if (!gPaletteFade.active)
+            DoSoftReset();
+        break;
+    }
+
+    if (gLinkStatus & 0x40 && !IsLinkMaster())
+    {
+        CloseLink();
+        GetEventLoadMessage(gStringVar4, 1);
+        PrintMysteryMenuText(0, gStringVar4, 1, 2, 1);
+        gMain.state = 13;
+    }
+
+    RunTasks();
+    AnimateSprites();
+    BuildOamBuffer();
+    RunTextPrinters();
+    UpdatePaletteFade();
+}
+
+static void PrintMysteryMenuText(u8 windowId, const u8 *text, u8 x, u8 y, s32 speed)
+{
+    struct TextColor textColor;
+    u8 letterSpacing = 0;
+    u8 lineSpacing = 1;
+    textColor.fgColor = 1;
+    textColor.bgColor = 2;
+    textColor.shadowColor = 3;
+
+    FillWindowPixelBuffer(windowId, (textColor.fgColor) | (textColor.fgColor << 4));
+    AddTextPrinterParameterized2(windowId, 1, x, y, letterSpacing, lineSpacing, &textColor, speed, text);
+}

src/trainer_see.c

@@ -6,7 +6,7 @@
 #include "field_effect.h"
 #include "field_map_obj.h"
 #include "field_player_avatar.h"
-#include "map_obj_8097404.h"
+#include "field_map_obj_helpers.h"
 #include "pokenav.h"
 #include "task.h"
 #include "util.h"
@@ -639,7 +639,7 @@ void sub_80B45D0(void)
             gApproachingTrainerId++;
             gSpecialVar_Result = 1;
             UnfreezeMapObjects();
-            sub_80974D0(gApproachingTrainers[1].mapObjectId);
+            FreezeMapObjectsExceptOne(gApproachingTrainers[1].mapObjectId);
         }
         else
         {