diff --git a/README.md b/README.md
index 0f9ed992352..f3ec1c793bd 100644
--- a/README.md
+++ b/README.md
@@ -55,7 +55,7 @@ Check out [Github Issues](https://github.com/pagefaultgames/pokerogue/issues) to
   - Pokémon Sword/Shield
   - Pokémon Legends: Arceus
   - Pokémon Scarlet/Violet
-  - Firel (Custom Laboratory, Metropolis, Seabed, and Space biome music)
+  - Firel (Custom Ice Cave, Laboratory, Metropolis, Plains, Power Plant, Seabed, Space, and Volcano biome music)
   - Lmz (Custom Jungle biome music)
   - Andr06 (Custom Slum and Sea biome music)
 
diff --git a/public/audio/bgm/ice_cave.mp3 b/public/audio/bgm/ice_cave.mp3
index 5d1b9e9e354..9d1c7c06bf0 100644
Binary files a/public/audio/bgm/ice_cave.mp3 and b/public/audio/bgm/ice_cave.mp3 differ
diff --git a/public/audio/bgm/plains.mp3 b/public/audio/bgm/plains.mp3
index 6c7a008bce6..ff364600b4a 100644
Binary files a/public/audio/bgm/plains.mp3 and b/public/audio/bgm/plains.mp3 differ
diff --git a/public/audio/bgm/power_plant.mp3 b/public/audio/bgm/power_plant.mp3
index 9813ad40a11..152667fcba6 100644
Binary files a/public/audio/bgm/power_plant.mp3 and b/public/audio/bgm/power_plant.mp3 differ
diff --git a/public/audio/bgm/volcano.mp3 b/public/audio/bgm/volcano.mp3
index 093bb86813b..a67bbd111de 100644
Binary files a/public/audio/bgm/volcano.mp3 and b/public/audio/bgm/volcano.mp3 differ
diff --git a/src/field/arena.ts b/src/field/arena.ts
index 0466c01c82b..bf4075e5c1c 100644
--- a/src/field/arena.ts
+++ b/src/field/arena.ts
@@ -746,7 +746,7 @@ export class Arena {
     case Biome.TOWN:
       return 7.288;
     case Biome.PLAINS:
-      return 7.693;
+      return 17.485;
     case Biome.GRASS:
       return 1.995;
     case Biome.TALL_GRASS:
@@ -774,13 +774,13 @@ export class Arena {
     case Biome.DESERT:
       return 1.143;
     case Biome.ICE_CAVE:
-      return 15.010;
+      return 0.000;
     case Biome.MEADOW:
       return 3.891;
     case Biome.POWER_PLANT:
-      return 2.810;
+      return 9.447;
     case Biome.VOLCANO:
-      return 5.116;
+      return 17.637;
     case Biome.GRAVEYARD:
       return 3.232;
     case Biome.DOJO:
diff --git a/src/locales/en/bgm-name.json b/src/locales/en/bgm-name.json
index c2babed4dff..e13f580def6 100644
--- a/src/locales/en/bgm-name.json
+++ b/src/locales/en/bgm-name.json
@@ -108,7 +108,7 @@
   "forest": "PMD EoS Dusk Forest",
   "grass": "PMD EoS Apple Woods",
   "graveyard": "PMD EoS Mystifying Forest",
-  "ice_cave": "PMD EoS Vast Ice Mountain",
+  "ice_cave": "Firel - -60F",
   "island": "PMD EoS Craggy Coast",
   "jungle": "Lmz - Jungle",
   "laboratory": "Firel - Laboratory",
@@ -116,8 +116,8 @@
   "meadow": "PMD EoS Sky Peak Forest",
   "metropolis": "Firel - Metropolis",
   "mountain": "PMD EoS Mt. Horn",
-  "plains": "PMD EoS Sky Peak Prairie",
-  "power_plant": "PMD EoS Far Amp Plains",
+  "plains": "Firel - Route 888",
+  "power_plant": "Firel - The Klink",
   "ruins": "PMD EoS Deep Sealed Ruin",
   "sea": "Andr06 - Marine Mystique",
   "seabed": "Firel - Seabed",
@@ -128,7 +128,7 @@
   "tall_grass": "PMD EoS Foggy Forest",
   "temple": "PMD EoS Aegis Cave",
   "town": "PMD EoS Random Dungeon Theme 3",
-  "volcano": "PMD EoS Steam Cave",
+  "volcano": "Firel - Twisturn Volcano",
   "wasteland": "PMD EoS Hidden Highland",
   "encounter_ace_trainer": "BW Trainers' Eyes Meet (Ace Trainer)",
   "encounter_backpacker": "BW Trainers' Eyes Meet (Backpacker)",