Document some battle anim funcs and data

src/battle_anim_dark.c

@@ -423,7 +423,7 @@ void AnimTask_MoveAttackerMementoShadow(u8 taskId)
     task->data[3] = GetBattlerSpriteBGPriorityRank(gBattleAnimAttacker);
     if (task->data[3] == 1)
     {
-        sub_80A6B30(&animBg);
+        GetDefaultBattleAnimBgData(&animBg);
         task->data[10] = gBattle_BG1_Y;
         SetGpuReg(REG_OFFSET_BLDCNT, BLDCNT_TGT2_ALL | BLDCNT_EFFECT_BLEND | BLDCNT_TGT1_BG1);
         FillPalette(0, animBg.paletteId * 16, 32);
@@ -564,7 +564,7 @@ void AnimTask_MoveTargetMementoShadow(u8 taskId)
     case 1:
         if (task->data[3] == 1)
         {
-            sub_80A6B30(&animBg);
+            GetDefaultBattleAnimBgData(&animBg);
             task->data[10] = gBattle_BG1_Y;
             FillPalette(0, animBg.paletteId * 16, 32);
         }
@@ -860,7 +860,7 @@ void AnimTask_MetallicShine(u8 taskId)
     spriteId = GetAnimBattlerSpriteId(ANIM_ATTACKER);
     newSpriteId = sub_80A89C8(gBattleAnimAttacker, spriteId, species);
 
-    sub_80A6B30(&animBg);
+    GetDefaultBattleAnimBgData(&animBg);
     AnimLoadCompressedBgTilemap(animBg.bgId, gMetalShineTilemap);
     AnimLoadCompressedBgGfx(animBg.bgId, gMetalShineGfx, animBg.tilesOffset);
     LoadCompressedPalette(gMetalShinePalette, animBg.paletteId * 16, 32);
@@ -903,7 +903,7 @@ static void AnimTask_MetallicShine_Step(u8 taskId)
                 SetGreyscaleOrOriginalPalette(paletteNum, TRUE);
 
             DestroySprite(&gSprites[gTasks[taskId].data[0]]);
-            sub_80A6B30(&animBg);
+            GetDefaultBattleAnimBgData(&animBg);
             sub_80A6C68(animBg.bgId);
             if (gTasks[taskId].data[6] == 1)
                 gSprites[gBattlerSpriteIds[BATTLE_PARTNER(gBattleAnimAttacker)]].oam.priority++;