diff --git a/constants/event_flags.asm b/constants/event_flags.asm
index 9b07e2860..cc9564d5b 100644
--- a/constants/event_flags.asm
+++ b/constants/event_flags.asm
@@ -746,8 +746,8 @@
 	const EVENT_CERULEAN_CAVE_B1F_MOON_STONE
 	const EVENT_CERULEAN_CAVE_B1F_MAGNET
 	const EVENT_CERULEAN_CAVE_B1F_LEFTOVERS
-	const EVENT_MEWTWO_APPEAR
-	const EVENT_FOUGHT_MEWTWO
+	const EVENT_MEWTWO_APPEAR ; ----unused
+	const EVENT_CERULEAN_CAVE_B1F_MEWTWO
 	const EVENT_POKEMON_MANSION_B1F_BOULDER_1
 	const EVENT_POKEMON_MANSION_B1F_BOULDER_2
 	const EVENT_POKEMON_MANSION_B1F_BOULDER_3
@@ -760,7 +760,8 @@
 	const EVENT_POKEMON_MANSION_B1F_RARE_CANDY
 	const EVENT_POKEMON_MANSION_B1F_HIDDEN_STAR_PIECE
 	const EVENT_ROUTE_11_SNORLAX_RESPAWN
-; Unused: next 103 events
+	const EVENT_POKEMON_MANSION_B1F_MEW
+; Unused: next 104 events
 
 	const_next 1000
 ; Trainer flags
diff --git a/data/maps/scenes.asm b/data/maps/scenes.asm
index 1f7db856b..ea06cd79f 100644
--- a/data/maps/scenes.asm
+++ b/data/maps/scenes.asm
@@ -85,7 +85,7 @@ MapScenes::
 	scene_var MOBILE_TRADE_ROOM,                           wMobileTradeRoomSceneID
 	scene_var MOBILE_BATTLE_ROOM,                          wMobileBattleRoomSceneID
 	scene_var POKEMON_MANSION_1F,                          wPokemonMansion1FSceneID
-	scene_var POKEMON_MANSION_B1F,                         wPokemonMansionB1FSceneID
+	scene_var POKEMON_MANSION_B1F,                         wPokemonMansionB1FSceneID ; unused
 	scene_var SAFARI_ZONE_ENTRANCE,                        wSafariZoneEntranceSceneID
 	scene_var PEWTER_MUSEUM_1F,                            wPewterMuseumSceneID
 	scene_var ROUTE_42_ECRUTEAK_GATE,                      wRoute42EcruteakGateSceneID
diff --git a/engine/events/std_scripts.asm b/engine/events/std_scripts.asm
index 667967959..fbf6bafab 100644
--- a/engine/events/std_scripts.asm
+++ b/engine/events/std_scripts.asm
@@ -670,6 +670,7 @@ InitializeEventsScript:
 	setevent EVENT_SAFARI_ZONE_ENTRANCE_OFFICER_SAFARI_GAME_ACTIVE
 	setevent EVENT_OLIVINE_LIGHTHOUSE_AMPHY_SICK
 	setevent EVENT_ROUTE_11_SNORLAX_RESPAWN
+	setevent EVENT_POKEMON_MANSION_B1F_MEW
 	endcallback
 
 AskNumber1MScript:
diff --git a/maps/CeruleanCaveB1F.asm b/maps/CeruleanCaveB1F.asm
index 410c451e2..d1e0b4193 100644
--- a/maps/CeruleanCaveB1F.asm
+++ b/maps/CeruleanCaveB1F.asm
@@ -16,22 +16,9 @@
 
 CeruleanCaveB1F_MapScripts:
 	def_scene_scripts
-	scene_script CeruleanCaveB1FNoop1Scene
 
 	def_callbacks
 
-CeruleanCaveB1FNoop1Scene:
-	checkevent EVENT_FOUGHT_MEWTWO
-	iftrue .DoNothing
-	readvar VAR_BADGES
-	ifequal NUM_BADGES, .MewtwoAppear
-.DoNothing
-	end
-
-.MewtwoAppear
-	setevent EVENT_MEWTWO_APPEAR
-	end
-
 CeruleanCaveB1FMewtwo:
 	opentext
 	writetext MewtwoText
@@ -42,7 +29,7 @@ CeruleanCaveB1FMewtwo:
 	loadwildmon MEWTWO, 70
 	startbattle
 	disappear CERULEAN_CAVE_B1F_MEWTWO
-	setevent EVENT_FOUGHT_MEWTWO
+	setevent EVENT_CERULEAN_CAVE_B1F_MEWTWO
 	reloadmapafterbattle
 	special CheckBattleCaughtResult
 	iffalse .nocatch
@@ -109,4 +96,4 @@ CeruleanCaveB1F_MapEvents:
 	object_event  8,  9, SPRITE_ROCK, SPRITEMOVEDATA_SMASHABLE_ROCK, 0, 0, -1, -1, 0, OBJECTTYPE_SCRIPT, 0, CeruleanCaveB1FRock, -1
 	object_event 25, 12, SPRITE_ROCK, SPRITEMOVEDATA_SMASHABLE_ROCK, 0, 0, -1, -1, 0, OBJECTTYPE_SCRIPT, 0, CeruleanCaveB1FRock, -1
 	object_event 24, 14, SPRITE_ROCK, SPRITEMOVEDATA_SMASHABLE_ROCK, 0, 0, -1, -1, 0, OBJECTTYPE_SCRIPT, 0, CeruleanCaveB1FRock, -1
-	object_event 34, 17, SPRITE_MEWTWO, SPRITEMOVEDATA_POKEMON, 0, 0, -1, -1, PAL_NPC_PINK, OBJECTTYPE_SCRIPT, 0,  CeruleanCaveB1FMewtwo, EVENT_MEWTWO_APPEAR
+	object_event 34, 17, SPRITE_MEWTWO, SPRITEMOVEDATA_POKEMON, 0, 0, -1, -1, PAL_NPC_PINK, OBJECTTYPE_SCRIPT, 0,  CeruleanCaveB1FMewtwo, EVENT_CERULEAN_CAVE_B1F_MEWTWO
diff --git a/maps/PokemonMansionB1F.asm b/maps/PokemonMansionB1F.asm
index 48ab0f4fb..3a07b0bbd 100644
--- a/maps/PokemonMansionB1F.asm
+++ b/maps/PokemonMansionB1F.asm
@@ -9,18 +9,11 @@
 
 PokemonMansionB1F_MapScripts:
 	def_scene_scripts
-	scene_script .DummyScene
 
 	def_callbacks
 	callback MAPCALLBACK_TILES, .BouldersPokemonMansionB1F
 	callback MAPCALLBACK_STONETABLE, .SetUpStoneTable
 
-.DummyScene:
-	checkevent EVENT_FOUGHT_MEW
-	iftrue .DoNothing
-	disappear POKEMON_MANSION_B1F_MEW
-.DoNothing
-	end
 
 .BouldersPokemonMansionB1F:
 	checkevent EVENT_POKEMON_MANSION_B1F_BOULDER_1
@@ -198,7 +191,7 @@ PokemonMansionB1F_MapEvents:
 	object_event 22, 23, SPRITE_BOULDER, SPRITEMOVEDATA_STRENGTH_BOULDER, 0, 0, -1, -1, 0, OBJECTTYPE_SCRIPT, 0, PokemonMansionB1FBoulder, EVENT_POKEMON_MANSION_B1F_BOULDER_1
 	object_event 25,  5, SPRITE_BOULDER, SPRITEMOVEDATA_STRENGTH_BOULDER, 0, 0, -1, -1, 0, OBJECTTYPE_SCRIPT, 0, PokemonMansionB1FBoulder, EVENT_POKEMON_MANSION_B1F_BOULDER_2
 	object_event 18, 25, SPRITE_BOULDER, SPRITEMOVEDATA_STRENGTH_BOULDER, 0, 0, -1, -1, 0, OBJECTTYPE_SCRIPT, 0, PokemonMansionB1FBoulder, EVENT_POKEMON_MANSION_B1F_BOULDER_3
-	object_event  4,  4, SPRITE_MEW, SPRITEMOVEDATA_POKEMON, 0, 0, -1, -1, PAL_NPC_PINK, OBJECTTYPE_SCRIPT, 0, ObjectEvent, -1
+	object_event  4,  4, SPRITE_MEW, SPRITEMOVEDATA_POKEMON, 0, 0, -1, -1, PAL_NPC_PINK, OBJECTTYPE_SCRIPT, 0, ObjectEvent, EVENT_POKEMON_MANSION_B1F_MEW
 	object_event  4,  5, SPRITE_PAPER, SPRITEMOVEDATA_STILL, 0, 0, -1, -1, PAL_NPC_ROCK, OBJECTTYPE_SCRIPT, 0, LabDocument, -1
 	object_event 14, 11, SPRITE_POKE_BALL, SPRITEMOVEDATA_STILL, 0, 0, -1, -1, 0, OBJECTTYPE_ITEMBALL, 0, PokemonMansionB1FFullRestore, EVENT_POKEMON_MANSION_B1F_FULL_RESTORE
 	object_event  4, 18, SPRITE_POKE_BALL, SPRITEMOVEDATA_STILL, 0, 0, -1, -1, 0, OBJECTTYPE_ITEMBALL, 0, PokemonMansionB1FRareCandy, EVENT_POKEMON_MANSION_B1F_RARE_CANDY