diff --git a/constants/map_data_constants.asm b/constants/map_data_constants.asm
index 136456d95..d288e07d5 100644
--- a/constants/map_data_constants.asm
+++ b/constants/map_data_constants.asm
@@ -32,6 +32,7 @@ MAP_NONE   EQU 0
 	const PALETTE_NITE
 	const PALETTE_MORN
 	const PALETTE_DARK
+NUM_MAP_PALETTES EQU const_value
 
 ; FishGroups indexes (see data/wild/fish.asm)
 	const_def
diff --git a/constants/wram_constants.asm b/constants/wram_constants.asm
index 0007bdaaf..c571faf8b 100644
--- a/constants/wram_constants.asm
+++ b/constants/wram_constants.asm
@@ -123,6 +123,9 @@ DARKNESS EQU 1 << DARKNESS_F
 
 ANYTIME EQU MORN | DAY | NITE
 
+; wTimeOfDayPalset::
+DARKNESS_PALSET EQU (DARKNESS_F << 6) | (DARKNESS_F << 4) | (DARKNESS_F << 2) | DARKNESS_F
+
 ; wBattleAnimFlags::
 	const_def
 	const BATTLEANIM_STOP_F          ; 0
diff --git a/engine/battle/battle_transition.asm b/engine/battle/battle_transition.asm
index a36927820..cf1ad1f8d 100644
--- a/engine/battle/battle_transition.asm
+++ b/engine/battle/battle_transition.asm
@@ -270,7 +270,7 @@ StartTrainerBattle_Flash:
 
 .DoFlashAnimation:
 	ld a, [wTimeOfDayPalset]
-	cp %11111111 ; dark cave
+	cp DARKNESS_PALSET
 	jr z, .done
 	ld hl, wcf64
 	ld a, [hl]
@@ -651,13 +651,13 @@ StartTrainerBattle_LoadPokeBallGraphics:
 	jr .nextscene
 
 .cgb
-	ld hl, .daypals
+	ld hl, .pals
 	ld a, [wTimeOfDayPal]
 	maskbits NUM_DAYTIMES
 	cp DARKNESS_F
-	jr nz, .daytime
-	ld hl, .nightpals
-.daytime
+	jr nz, .not_dark
+	ld hl, .darkpals
+.not_dark
 	ldh a, [rSVBK]
 	push af
 	ld a, BANK(wBGPals1)
@@ -702,11 +702,11 @@ StartTrainerBattle_LoadPokeBallGraphics:
 	pop hl
 	ret
 
-.daypals
-INCLUDE "gfx/overworld/trainer_battle_day.pal"
+.pals
+INCLUDE "gfx/overworld/trainer_battle.pal"
 
-.nightpals
-INCLUDE "gfx/overworld/trainer_battle_nite.pal"
+.darkpals
+INCLUDE "gfx/overworld/trainer_battle_dark.pal"
 
 .loadpokeballgfx
 	ld a, [wOtherTrainerClass]
diff --git a/engine/events/overworld.asm b/engine/events/overworld.asm
index d0ab25d62..eee3e2df3 100644
--- a/engine/events/overworld.asm
+++ b/engine/events/overworld.asm
@@ -289,7 +289,7 @@ FlashFunction:
 	pop hl
 	jr c, .useflash
 	ld a, [wTimeOfDayPalset]
-	cp %11111111 ; 3, 3, 3, 3
+	cp DARKNESS_PALSET
 	jr nz, .notadarkcave
 .useflash
 	call UseFlash
diff --git a/engine/tilesets/tileset_anims.asm b/engine/tilesets/tileset_anims.asm
index 33e956df0..5e673356d 100644
--- a/engine/tilesets/tileset_anims.asm
+++ b/engine/tilesets/tileset_anims.asm
@@ -925,7 +925,7 @@ FlickeringCaveEntrancePalette:
 	ret nz
 ; We only want to be here if we're in a dark cave.
 	ld a, [wTimeOfDayPalset]
-	cp %11111111 ; 3,3,3,3
+	cp DARKNESS_PALSET
 	ret nz
 
 	ldh a, [rSVBK]
diff --git a/engine/tilesets/timeofday_pals.asm b/engine/tilesets/timeofday_pals.asm
index e890607d4..2f61f1930 100644
--- a/engine/tilesets/timeofday_pals.asm
+++ b/engine/tilesets/timeofday_pals.asm
@@ -190,7 +190,7 @@ ReplaceTimeOfDayPals:
 	ld a, [wMapTimeOfDay]
 	cp PALETTE_DARK
 	jr z, .NeedsFlash
-	and $7
+	maskbits NUM_MAP_PALETTES
 	add l
 	ld l, a
 	ld a, 0
@@ -204,55 +204,57 @@ ReplaceTimeOfDayPals:
 	ld a, [wStatusFlags]
 	bit STATUSFLAGS_FLASH_F, a
 	jr nz, .UsedFlash
-	ld a, %11111111 ; 3, 3, 3, 3
+	ld a, DARKNESS_PALSET
 	ld [wTimeOfDayPalset], a
 	ret
 
 .UsedFlash:
-	ld a, %10101010 ; 2, 2, 2, 2
+	ld a, (NITE_F << 6) | (NITE_F << 4) | (NITE_F << 2) | NITE_F
 	ld [wTimeOfDayPalset], a
 	ret
 
 .BrightnessLevels:
-	dc 3, 2, 1, 0
-	dc 1, 1, 1, 1
-	dc 2, 2, 2, 2
-	dc 0, 0, 0, 0
-	dc 3, 3, 3, 3
-	dc 3, 2, 1, 0
-	dc 3, 2, 1, 0
-	dc 3, 2, 1, 0
+; actual palettes used when time is
+; DARKNESS_F, NITE_F, DAY_F, MORN_F
+	dc DARKNESS_F, NITE_F,     DAY_F,      MORN_F     ; PALETTE_AUTO
+	dc DAY_F,      DAY_F,      DAY_F,      DAY_F      ; PALETTE_DAY
+	dc NITE_F,     NITE_F,     NITE_F,     NITE_F     ; PALETTE_NITE
+	dc MORN_F,     MORN_F,     MORN_F,     MORN_F     ; PALETTE_MORN
+	dc DARKNESS_F, DARKNESS_F, DARKNESS_F, DARKNESS_F ; PALETTE_DARK
+	dc DARKNESS_F, NITE_F,     DAY_F,      MORN_F
+	dc DARKNESS_F, NITE_F,     DAY_F,      MORN_F
+	dc DARKNESS_F, NITE_F,     DAY_F,      MORN_F
 
 GetTimePalette:
 	jumptable .TimePalettes, wTimeOfDay
 
 .TimePalettes:
-	dw .MorningPalette
-	dw .DayPalette
-	dw .NitePalette
-	dw .DarknessPalette
+	dw .MorningPalette  ; MORN_F
+	dw .DayPalette      ; DAY_F
+	dw .NitePalette     ; NITE_F
+	dw .DarknessPalette ; DARKNESS_F
 
 .MorningPalette:
 	ld a, [wTimeOfDayPalset]
-	and %00000011 ; 0
+	and %00000011
 	ret
 
 .DayPalette:
 	ld a, [wTimeOfDayPalset]
-	and %00001100 ; 1
+	and %00001100
 	srl a
 	srl a
 	ret
 
 .NitePalette:
 	ld a, [wTimeOfDayPalset]
-	and %00110000 ; 2
+	and %00110000
 	swap a
 	ret
 
 .DarknessPalette:
 	ld a, [wTimeOfDayPalset]
-	and %11000000 ; 3
+	and %11000000
 	rlca
 	rlca
 	ret
diff --git a/gfx/overworld/trainer_battle_day.pal b/gfx/overworld/trainer_battle.pal
similarity index 100%
rename from gfx/overworld/trainer_battle_day.pal
rename to gfx/overworld/trainer_battle.pal
diff --git a/gfx/overworld/trainer_battle_nite.pal b/gfx/overworld/trainer_battle_dark.pal
similarity index 100%
rename from gfx/overworld/trainer_battle_nite.pal
rename to gfx/overworld/trainer_battle_dark.pal