Rename song constants using Japanese sound test menu

data/maps/VermilionCity_Gym/map.json

@@ -2,7 +2,7 @@
   "id": "MAP_VERMILION_CITY_GYM",
   "name": "VermilionCity_Gym",
   "layout": "LAYOUT_VERMILION_CITY_GYM",
-  "music": "BGM_FRLG_GYM",
+  "music": "MUS_GYM",
   "region_map_section": "MAPSEC_VERMILION_CITY",
   "requires_flash": false,
   "weather": "WEATHER_NONE",

data/maps/VermilionCity_Gym/scripts.inc

@@ -183,7 +183,7 @@ EventScript_16B8CB:: @ 816B8CB
 	closemessage
 	call EventScript_16B717
 	special DrawWholeMapView
-	playse SE_FU_ZAKU2
+	playse SE_KI_GASYAN
 	waitse
 	setflag FLAG_0x264
 	releaseall

data/maps/VermilionCity_Gym/text.inc

@@ -7,7 +7,7 @@ Text_194BA4:: @ 8194BA4
     .string "saved me during the war!\p"
     .string "They zapped my enemies into\n"
     .string "paralysis!\p"
-    .string "The same as I'll do to you!{PLAY_BGM}{BGM_FRLG_LEADER_EYE}$"
+    .string "The same as I'll do to you!{PLAY_BGM}{MUS_EXEYE}$"
 
 gUnknown_8194C8E:: @ 8194C8E
     .string "A little word of advice, kid!\p"