diff --git a/src/battle_bg.c b/src/battle_bg.c
index 2e9265834388..b18962af9918 100644
--- a/src/battle_bg.c
+++ b/src/battle_bg.c
@@ -765,17 +765,17 @@ void DrawMainBattleBackground(void)
         case SPECIES_GROUDON:
             LZDecompressVram(gBattleTerrainTiles_Cave, (void*)(BG_CHAR_ADDR(2)));
             LZDecompressVram(gBattleTerrainTilemap_Cave, (void*)(BG_SCREEN_ADDR(26)));
-            LoadCompressedPalette(gBattleTerrainPalette_Groudon, 0x20, 0x60);
+            LoadCompressedPalette(gBattleTerrainPalette_Groudon, BG_PLTT_ID(2), 3 * PLTT_SIZE_4BPP);
             break;
         case SPECIES_KYOGRE:
             LZDecompressVram(gBattleTerrainTiles_Water, (void*)(BG_CHAR_ADDR(2)));
             LZDecompressVram(gBattleTerrainTilemap_Water, (void*)(BG_SCREEN_ADDR(26)));
-            LoadCompressedPalette(gBattleTerrainPalette_Kyogre, 0x20, 0x60);
+            LoadCompressedPalette(gBattleTerrainPalette_Kyogre, BG_PLTT_ID(2), 3 * PLTT_SIZE_4BPP);
             break;
         case SPECIES_RAYQUAZA:
             LZDecompressVram(gBattleTerrainTiles_Rayquaza, (void*)(BG_CHAR_ADDR(2)));
             LZDecompressVram(gBattleTerrainTilemap_Rayquaza, (void*)(BG_SCREEN_ADDR(26)));
-            LoadCompressedPalette(gBattleTerrainPalette_Rayquaza, 0x20, 0x60);
+            LoadCompressedPalette(gBattleTerrainPalette_Rayquaza, BG_PLTT_ID(2), 3 * PLTT_SIZE_4BPP);
             break;
         default:
             LZDecompressVram(sBattleTerrainTable[gBattleTerrain].tileset, (void *)(BG_CHAR_ADDR(2)));
@@ -1370,7 +1370,7 @@ bool8 LoadChosenBattleElement(u8 caseId)
         else if (gBattleTypeFlags & BATTLE_TYPE_LEGENDARY)
         {
             if (GetMonData(&gEnemyParty[0], MON_DATA_SPECIES, NULL) == SPECIES_GROUDON)
-                LoadCompressedPalette(gBattleTerrainPalette_Groudon, 0x20, 0x60);
+                LoadCompressedPalette(gBattleTerrainPalette_Groudon, BG_PLTT_ID(2), 3 * PLTT_SIZE_4BPP);
             else
                 LoadCompressedPalette(gBattleTerrainPalette_Kyogre, BG_PLTT_ID(2), 3 * PLTT_SIZE_4BPP);
         }