diff --git a/constants/move_effect_constants.asm b/constants/move_effect_constants.asm
index 8f33ece321..6914fafdf1 100644
--- a/constants/move_effect_constants.asm
+++ b/constants/move_effect_constants.asm
@@ -9,7 +9,7 @@
 	const POISON_SIDE_EFFECT1        ; $02
 	const DRAIN_HP_EFFECT            ; $03
 	const BURN_SIDE_EFFECT1          ; $04
-	const FREEZE_SIDE_EFFECT         ; $05
+	const FREEZE_SIDE_EFFECT1        ; $05
 	const PARALYZE_SIDE_EFFECT1      ; $06
 	const EXPLODE_EFFECT             ; $07 Explosion, Self Destruct
 	const DREAM_EATER_EFFECT         ; $08
@@ -39,7 +39,7 @@
 	const SLEEP_EFFECT               ; $20
 	const POISON_SIDE_EFFECT2        ; $21
 	const BURN_SIDE_EFFECT2          ; $22
-	const_skip                       ; $23
+	const FREEZE_SIDE_EFFECT2        ; $23 unused (Blizzard in JP Red/Green)
 	const PARALYZE_SIDE_EFFECT2      ; $24
 	const FLINCH_SIDE_EFFECT2        ; $25
 	const OHKO_EFFECT                ; $26 moves like Horn Drill
diff --git a/data/moves/effects_pointers.asm b/data/moves/effects_pointers.asm
index c33a5fd668..63350efc85 100644
--- a/data/moves/effects_pointers.asm
+++ b/data/moves/effects_pointers.asm
@@ -5,7 +5,7 @@ MoveEffectPointerTable:
 	dw PoisonEffect              ; POISON_SIDE_EFFECT1
 	dw DrainHPEffect             ; DRAIN_HP_EFFECT
 	dw FreezeBurnParalyzeEffect  ; BURN_SIDE_EFFECT1
-	dw FreezeBurnParalyzeEffect  ; FREEZE_SIDE_EFFECT
+	dw FreezeBurnParalyzeEffect  ; FREEZE_SIDE_EFFECT1
 	dw FreezeBurnParalyzeEffect  ; PARALYZE_SIDE_EFFECT1
 	dw ExplodeEffect             ; EXPLODE_EFFECT
 	dw DrainHPEffect             ; DREAM_EATER_EFFECT
@@ -35,7 +35,7 @@ MoveEffectPointerTable:
 	dw SleepEffect               ; SLEEP_EFFECT
 	dw PoisonEffect              ; POISON_SIDE_EFFECT2
 	dw FreezeBurnParalyzeEffect  ; BURN_SIDE_EFFECT2
-	dw FreezeBurnParalyzeEffect  ; unused effect
+	dw FreezeBurnParalyzeEffect  ; FREEZE_SIDE_EFFECT2
 	dw FreezeBurnParalyzeEffect  ; PARALYZE_SIDE_EFFECT2
 	dw FlinchSideEffect          ; FLINCH_SIDE_EFFECT2
 	dw OneHitKOEffect            ; OHKO_EFFECT
diff --git a/data/moves/moves.asm b/data/moves/moves.asm
index c32a89cb93..e59ed0070c 100644
--- a/data/moves/moves.asm
+++ b/data/moves/moves.asm
@@ -18,7 +18,7 @@ Moves:
 	move MEGA_PUNCH,   NO_ADDITIONAL_EFFECT,        80, NORMAL,        85, 20
 	move PAY_DAY,      PAY_DAY_EFFECT,              40, NORMAL,       100, 20
 	move FIRE_PUNCH,   BURN_SIDE_EFFECT1,           75, FIRE,         100, 15
-	move ICE_PUNCH,    FREEZE_SIDE_EFFECT,          75, ICE,          100, 15
+	move ICE_PUNCH,    FREEZE_SIDE_EFFECT1,         75, ICE,          100, 15
 	move THUNDERPUNCH, PARALYZE_SIDE_EFFECT1,       75, ELECTRIC,     100, 15
 	move SCRATCH,      NO_ADDITIONAL_EFFECT,        40, NORMAL,       100, 35
 	move VICEGRIP,     NO_ADDITIONAL_EFFECT,        55, NORMAL,       100, 30
@@ -68,8 +68,8 @@ Moves:
 	move WATER_GUN,    NO_ADDITIONAL_EFFECT,        40, WATER,        100, 25
 	move HYDRO_PUMP,   NO_ADDITIONAL_EFFECT,       120, WATER,         80,  5
 	move SURF,         NO_ADDITIONAL_EFFECT,        95, WATER,        100, 15
-	move ICE_BEAM,     FREEZE_SIDE_EFFECT,          95, ICE,          100, 10
-	move BLIZZARD,     FREEZE_SIDE_EFFECT,         120, ICE,           90,  5
+	move ICE_BEAM,     FREEZE_SIDE_EFFECT1,         95, ICE,          100, 10
+	move BLIZZARD,     FREEZE_SIDE_EFFECT1,        120, ICE,           90,  5
 	move PSYBEAM,      CONFUSION_SIDE_EFFECT,       65, PSYCHIC_TYPE, 100, 20
 	move BUBBLEBEAM,   SPEED_DOWN_SIDE_EFFECT,      65, WATER,        100, 20
 	move AURORA_BEAM,  ATTACK_DOWN_SIDE_EFFECT,     65, ICE,          100, 20
diff --git a/engine/battle/effects.asm b/engine/battle/effects.asm
index 95c8706f16..47b1331102 100644
--- a/engine/battle/effects.asm
+++ b/engine/battle/effects.asm
@@ -216,7 +216,9 @@ FreezeBurnParalyzeEffect:
 	jr c, .regular_effectiveness
 ; extra effectiveness
 	ld b, 30 percent + 1
-	sub BURN_SIDE_EFFECT2 - BURN_SIDE_EFFECT1 ; treat extra effective as regular from now on
+	assert PARALYZE_SIDE_EFFECT2 - PARALYZE_SIDE_EFFECT1 == BURN_SIDE_EFFECT2 - BURN_SIDE_EFFECT1
+	assert PARALYZE_SIDE_EFFECT2 - PARALYZE_SIDE_EFFECT1 == FREEZE_SIDE_EFFECT2 - FREEZE_SIDE_EFFECT1
+	sub PARALYZE_SIDE_EFFECT2 - PARALYZE_SIDE_EFFECT1 ; treat extra effective as regular from now on
 .regular_effectiveness
 	push af
 	call BattleRandom ; get random 8bit value for probability test
@@ -226,7 +228,7 @@ FreezeBurnParalyzeEffect:
 	ld a, b ; what type of effect is this?
 	cp BURN_SIDE_EFFECT1
 	jr z, .burn1
-	cp FREEZE_SIDE_EFFECT
+	cp FREEZE_SIDE_EFFECT1
 	jr z, .freeze1
 ; .paralyze1
 	ld a, 1 << PAR
@@ -279,7 +281,7 @@ FreezeBurnParalyzeEffect:
 	ld a, b
 	cp BURN_SIDE_EFFECT1
 	jr z, .burn2
-	cp FREEZE_SIDE_EFFECT
+	cp FREEZE_SIDE_EFFECT1
 	jr z, .freeze2
 ; .paralyze2
 	ld a, 1 << PAR