diff --git a/constants/item_constants.asm b/constants/item_constants.asm
index a7132670..6dd6cf8a 100644
--- a/constants/item_constants.asm
+++ b/constants/item_constants.asm
@@ -52,13 +52,13 @@ DEF SAFARI_ROCK EQU CASCADEBADGE ; overload
 	const DOME_FOSSIL   ; $29
 	const HELIX_FOSSIL  ; $2A
 	const SECRET_KEY    ; $2B
-	const ITEM_2C       ; $2C
+	const ITEM_2C       ; $2C ; unused
 	const BIKE_VOUCHER  ; $2D
 	const X_ACCURACY    ; $2E
 	const LEAF_STONE    ; $2F
 	const CARD_KEY      ; $30
 	const NUGGET        ; $31
-	const ITEM_32       ; $32
+	const ITEM_32       ; $32 ; unused
 	const POKE_DOLL     ; $33
 	const FULL_HEAL     ; $34
 	const REVIVE        ; $35
diff --git a/data/moves/animations.asm b/data/moves/animations.asm
index 29a78477..e9fdc34c 100644
--- a/data/moves/animations.asm
+++ b/data/moves/animations.asm
@@ -28,7 +28,7 @@ AttackAnimationPointers:
 	dw JumpKickAnim
 	dw RollingKickAnim
 	dw SandAttackAnim
-	dw HeadButtAnim
+	dw HeadbuttAnim
 	dw HornAttackAnim
 	dw FuryAttackAnim
 	dw HornDrillAnim
@@ -363,7 +363,7 @@ SandAttackAnim:
 	battle_anim SAND_ATTACK, SUBANIM_1_SAND, 1, 6
 	db -1 ; end
 
-HeadButtAnim:
+HeadbuttAnim:
 	battle_anim HEADBUTT, SUBANIM_1_STAR_BIG, 1, 6
 	db -1 ; end
 
diff --git a/engine/items/item_effects.asm b/engine/items/item_effects.asm
index 12c7dade..d312059a 100644
--- a/engine/items/item_effects.asm
+++ b/engine/items/item_effects.asm
@@ -23,7 +23,7 @@ ItemUsePtrTable:
 	dw ItemUseBall       ; POKE_BALL
 	dw ItemUseTownMap    ; TOWN_MAP
 	dw ItemUseBicycle    ; BICYCLE
-	dw ItemUseSurfboard  ; out-of-battle Surf effect
+	dw ItemUseSurfboard  ; SURFBOARD
 	dw ItemUseBall       ; SAFARI_BALL
 	dw ItemUsePokedex    ; POKEDEX
 	dw ItemUseEvoStone   ; MOON_STONE
@@ -60,19 +60,19 @@ ItemUsePtrTable:
 	dw UnusableItem      ; DOME_FOSSIL
 	dw UnusableItem      ; HELIX_FOSSIL
 	dw UnusableItem      ; SECRET_KEY
-	dw UnusableItem
+	dw UnusableItem      ; ITEM_2C
 	dw UnusableItem      ; BIKE_VOUCHER
 	dw ItemUseXAccuracy  ; X_ACCURACY
 	dw ItemUseEvoStone   ; LEAF_STONE
 	dw ItemUseCardKey    ; CARD_KEY
 	dw UnusableItem      ; NUGGET
-	dw UnusableItem      ; ??? PP_UP
-	dw ItemUsePokedoll   ; POKE_DOLL
+	dw UnusableItem      ; ITEM_32
+	dw ItemUsePokeDoll   ; POKE_DOLL
 	dw ItemUseMedicine   ; FULL_HEAL
 	dw ItemUseMedicine   ; REVIVE
 	dw ItemUseMedicine   ; MAX_REVIVE
 	dw ItemUseGuardSpec  ; GUARD_SPEC
-	dw ItemUseSuperRepel ; SUPER_REPL
+	dw ItemUseSuperRepel ; SUPER_REPEL
 	dw ItemUseMaxRepel   ; MAX_REPEL
 	dw ItemUseDireHit    ; DIRE_HIT
 	dw UnusableItem      ; COIN
@@ -89,13 +89,13 @@ ItemUsePtrTable:
 	dw ItemUseOaksParcel ; OAKS_PARCEL
 	dw ItemUseItemfinder ; ITEMFINDER
 	dw UnusableItem      ; SILPH_SCOPE
-	dw ItemUsePokeflute  ; POKE_FLUTE
+	dw ItemUsePokeFlute  ; POKE_FLUTE
 	dw UnusableItem      ; LIFT_KEY
 	dw UnusableItem      ; EXP_ALL
 	dw ItemUseOldRod     ; OLD_ROD
 	dw ItemUseGoodRod    ; GOOD_ROD
 	dw ItemUseSuperRod   ; SUPER_ROD
-	dw ItemUsePPUp       ; PP_UP (real one)
+	dw ItemUsePPUp       ; PP_UP
 	dw ItemUsePPRestore  ; ETHER
 	dw ItemUsePPRestore  ; MAX_ETHER
 	dw ItemUsePPRestore  ; ELIXER
@@ -665,7 +665,7 @@ ItemUseBicycle:
 .printText
 	jp PrintText
 
-; used for Surf out-of-battle effect
+; indirectly used by SURF in StartMenu_Pokemon.surf
 ItemUseSurfboard:
 	ld a, [wWalkBikeSurfState]
 	ld [wWalkBikeSurfStateCopy], a
@@ -1427,6 +1427,9 @@ VitaminNoEffectText:
 
 INCLUDE "data/battle/stat_names.asm"
 
+; for BOULDERBADGE when used from the
+; ITEM window, which corresponds to
+; SAFARI_BAIT during Safari Game encounters
 ItemUseBait:
 	ld hl, ThrewBaitText
 	call PrintText
@@ -1437,6 +1440,9 @@ ItemUseBait:
 	ld de, wSafariEscapeFactor ; escape factor
 	jr BaitRockCommon
 
+; for CASCADEBADGE when used from the
+; ITEM window, which corresponds to
+; SAFARI_ROCK during Safari Game encounters
 ItemUseRock:
 	ld hl, ThrewRockText
 	call PrintText
@@ -1482,7 +1488,7 @@ ThrewRockText:
 	text_far _ThrewRockText
 	text_end
 
-; also used for Dig out-of-battle effect
+; indirectly used by DIG in StartMenu_Pokemon.dig
 ItemUseEscapeRope:
 	ld a, [wIsInBattle]
 	and a
@@ -1597,7 +1603,7 @@ ItemUseCardKey:
 
 INCLUDE "data/events/card_key_coords.asm"
 
-ItemUsePokedoll:
+ItemUsePokeDoll:
 	ld a, [wIsInBattle]
 	dec a
 	jp nz, ItemUseNotTime
@@ -1662,7 +1668,7 @@ ItemUseXStat:
 	ld [hl], a ; restore [wPlayerMoveNum]
 	ret
 
-ItemUsePokeflute:
+ItemUsePokeFlute:
 	ld a, [wIsInBattle]
 	and a
 	jr nz, .inBattle