diff --git a/Makefile b/Makefile
index e213bf63c..bbc1060c5 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-roms := pokecrystal.gbc pokecrystal11.gbc
+roms := pokecrystal.gbc pokecrystal11.gbc pokecrystal-au.gbc
 
 crystal_obj := \
 audio.o \
@@ -17,6 +17,7 @@ gfx/sprites.o \
 lib/mobile/main.o
 
 crystal11_obj := $(crystal_obj:.o=11.o)
+crystal_au_obj := $(crystal_obj:.o=_au.o)
 
 
 ### Build tools
@@ -37,7 +38,7 @@ RGBLINK ?= $(RGBDS)rgblink
 ### Build targets
 
 .SUFFIXES:
-.PHONY: all crystal crystal11 clean tidy compare tools
+.PHONY: all crystal crystal11 crystal_au clean tidy compare tools
 .SECONDEXPANSION:
 .PRECIOUS:
 .SECONDARY:
@@ -45,15 +46,16 @@ RGBLINK ?= $(RGBDS)rgblink
 all: crystal
 crystal: pokecrystal.gbc
 crystal11: pokecrystal11.gbc
+crystal-au: pokecrystal-au.gbc
 
 clean:
-	rm -f $(roms) $(crystal_obj) $(crystal11_obj) $(roms:.gbc=.map) $(roms:.gbc=.sym)
+	rm -f $(roms) $(crystal_obj) $(crystal11_obj) $(crystal_au_obj) $(roms:.gbc=.map) $(roms:.gbc=.sym)
 	find gfx \( -name "*.[12]bpp" -o -name "*.lz" -o -name "*.gbcpal" \) -delete
 	find gfx/pokemon -mindepth 1 ! -path "gfx/pokemon/unown/*" \( -name "bitmask.asm" -o -name "frames.asm" -o -name "front.animated.tilemap" -o -name "front.dimensions" \) -delete
 	$(MAKE) clean -C tools/
 
 tidy:
-	rm -f $(roms) $(crystal_obj) $(crystal11_obj) $(roms:.gbc=.map) $(roms:.gbc=.sym)
+	rm -f $(roms) $(crystal_obj) $(crystal11_obj) $(crystal_au_obj) $(roms:.gbc=.map) $(roms:.gbc=.sym)
 	$(MAKE) clean -C tools/
 
 compare: $(roms)
@@ -65,6 +67,7 @@ tools:
 
 $(crystal_obj):   RGBASMFLAGS = -D _CRYSTAL
 $(crystal11_obj): RGBASMFLAGS = -D _CRYSTAL -D _CRYSTAL11
+$(crystal_au_obj): RGBASMFLAGS = -D _CRYSTAL -D _CRYSTAL11 -D _CRYSTAL_AU
 
 # The dep rules have to be explicit or else missing files won't be reported.
 # As a side effect, they're evaluated immediately instead of when the rule is invoked.
@@ -80,6 +83,7 @@ ifeq (,$(filter clean tools,$(MAKECMDGOALS)))
 
 $(info $(shell $(MAKE) -C tools))
 
+$(foreach obj, $(crystal_au_obj), $(eval $(call DEP,$(obj),$(obj:_au.o=.asm))))
 $(foreach obj, $(crystal11_obj), $(eval $(call DEP,$(obj),$(obj:11.o=.asm))))
 $(foreach obj, $(crystal_obj), $(eval $(call DEP,$(obj),$(obj:.o=.asm))))
 
@@ -96,6 +100,11 @@ pokecrystal11.gbc: $(crystal11_obj) pokecrystal.link
 	$(RGBFIX) -Cjv -i BYTE -k 01 -l 0x33 -m 0x10 -n 1 -p 0 -r 3 -t PM_CRYSTAL $@
 	tools/sort_symfile.sh pokecrystal11.sym
 
+pokecrystal-au.gbc: $(crystal_au_obj) pokecrystal.link
+	$(RGBLINK) -n pokecrystal-au.sym -m pokecrystal-au.map -l pokecrystal.link -o $@ $(crystal_au_obj)
+	$(RGBFIX) -Cjv -i BYTU -k 01 -l 0x33 -m 0x10 -p 0 -r 3 -t PM_CRYSTAL $@
+	tools/sort_symfile.sh pokecrystal-au.sym
+
 
 # For files that the compressor can't match, there will be a .lz file suffixed with the md5 hash of the correct uncompressed file.
 # If the hash of the uncompressed file matches, use this .lz instead.
diff --git a/data/phone/text/buena.asm b/data/phone/text/buena.asm
index 951a0a9b8..2503ae73c 100644
--- a/data/phone/text/buena.asm
+++ b/data/phone/text/buena.asm
@@ -469,11 +469,16 @@ UnknownText_0xa1c88:
 	para "CORNER tomorrow."
 	line "It's been a while."
 
+if DEF(_CRYSTAL_AU)
+	para "Some machines pays"
+	line "out a lot."
+else
 	para "You see, I have my"
 	line "favorite machine…"
 
 	para "It pays out a lot,"
 	line "I kid you not!"
+endc
 
 	para "Huh? Nuh-uh, it's"
 	line "my secret!"
diff --git a/main.asm b/main.asm
index bf23cf9f7..9d22f010d 100644
--- a/main.asm
+++ b/main.asm
@@ -711,7 +711,9 @@ INCLUDE "engine/events/odd_egg.asm"
 
 SECTION "Mobile Stadium 2", ROMX
 
-if DEF(_CRYSTAL11)
+if DEF(_CRYSTAL_AU)
+INCBIN "mobile/stadium/stadium2_3.bin"
+elif DEF(_CRYSTAL11)
 INCBIN "mobile/stadium/stadium2_2.bin"
 else
 INCBIN "mobile/stadium/stadium2_1.bin"
diff --git a/maps/CeladonCity.asm b/maps/CeladonCity.asm
index 36ff6b714..491791264 100644
--- a/maps/CeladonCity.asm
+++ b/maps/CeladonCity.asm
@@ -89,6 +89,11 @@ CeladonCityPoliwrathText:
 	done
 
 CeladonCityTeacher1Text:
+if DEF(_CRYSTAL_AU)
+	text "I lost at the"
+	line "machines."
+	done
+else
 	text "I lost at the slot"
 	line "machines again…"
 
@@ -98,6 +103,7 @@ CeladonCityTeacher1Text:
 	para "You should check"
 	line "them out too."
 	done
+endc
 
 CeladonCityGramps1Text:
 	text "GRIMER have been"
@@ -212,10 +218,17 @@ CeladonCityMansionSignText:
 	done
 
 CeladonCityGameCornerSignText:
+if DEF(_CRYSTAL_AU)
+	text "The Game Area for"
+	line "Grown-ups--CELADON"
+	cont "GAME CORNER"
+	done
+else
 	text "The Playground for"
 	line "Everybody--CELADON"
 	cont "GAME CORNER"
 	done
+endc
 
 CeladonCityTrainerTipsText:
 	text "TRAINER TIPS"
diff --git a/maps/CeladonGameCorner.asm b/maps/CeladonGameCorner.asm
index c1e3ced8f..0325be7be 100644
--- a/maps/CeladonGameCorner.asm
+++ b/maps/CeladonGameCorner.asm
@@ -164,6 +164,12 @@ CeladonGameCornerPokefanMText:
 	done
 
 CeladonGameCornerTeacherText:
+if DEF(_CRYSTAL_AU)
+	text "The weather"
+	line "outside is very"
+	cont "nice."
+	done
+else
 	text "It's this machine"
 	line "I want."
 
@@ -173,8 +179,15 @@ CeladonGameCornerTeacherText:
 	para "should pay out"
 	line "today."
 	done
+endc
 
 CeladonGameCornerFishingGuruText:
+if DEF(_CRYSTAL_AU)
+	text "This machine looks"
+	line "the same as the"
+	cont "others."
+	done
+else
 	text "I think this slot"
 	line "machine will pay"
 	cont "out…"
@@ -182,8 +195,19 @@ CeladonGameCornerFishingGuruText:
 	para "The odds vary"
 	line "among machines."
 	done
+endc
 
 CeladonGameCornerFisherText1:
+if DEF(_CRYSTAL_AU)
+	text "Whoa!"
+
+	para "What? You want to"
+	line "play this machine?"
+
+	para "Here, take my"
+	line "coins."
+	done
+else
 	text "Gahahaha!"
 
 	para "The coins just"
@@ -195,6 +219,7 @@ CeladonGameCornerFisherText1:
 	para "I'll share my luck"
 	line "with you!"
 	done
+endc
 
 CeladonGameCornerFisherText2:
 	text "Gahahaha!"
@@ -216,6 +241,11 @@ CeladonGameCornerFisherNoCoinCaseText:
 	done
 
 CeladonGameCornerFisherFullCoinCaseText:
+if DEF(_CRYSTAL_AU)
+	text "Your COIN CASE is"
+	line "full."
+	done
+else
 	text "Hey, your COIN"
 	line "CASE is full, kid."
 
@@ -223,13 +253,18 @@ CeladonGameCornerFisherFullCoinCaseText:
 	line "a winning streak"
 	cont "too."
 	done
+endc
 
 CeladonGymGuyText:
 	text "Hey! CHAMP in"
 	line "making!"
 
 	para "Are you playing"
+if DEF(_CRYSTAL_AU)
+	line "too?"
+else
 	line "the slots too?"
+endc
 
 	para "I'm trying to get"
 	line "enough coins for a"
@@ -240,12 +275,19 @@ CeladonGymGuyText:
 	done
 
 CeladonGameCornerGrampsText:
+if DEF(_CRYSTAL_AU)
+	text "Is there any"
+	line "difference between"
+	cont "these lines?"
+	done
+else
 	text "Hmmm… The odds are"
 	line "surely better for"
 
 	para "PIKACHU's line,"
 	line "but… What to do?"
 	done
+endc
 
 CeladonGameCornerPoster1Text:
 	text "Hey!"
diff --git a/maps/CeladonGameCornerPrizeRoom.asm b/maps/CeladonGameCornerPrizeRoom.asm
index ea7ecc5b2..018573798 100644
--- a/maps/CeladonGameCornerPrizeRoom.asm
+++ b/maps/CeladonGameCornerPrizeRoom.asm
@@ -214,6 +214,11 @@ CeladonGameCornerPrizeRoomGentlemanText:
 	done
 
 CeladonGameCornerPrizeRoomPharmacistText:
+if DEF(_CRYSTAL_AU)
+	text "I don't want to"
+	line "lose my coins."
+	done
+else
 	text "Whew…"
 
 	para "I've got to stay"
@@ -223,6 +228,7 @@ CeladonGameCornerPrizeRoomPharmacistText:
 	line "cool, or I'll lose"
 	cont "all my money…"
 	done
+endc
 
 CeladonPrizeRoom_PrizeVendorIntroText:
 	text "Welcome!"
diff --git a/maps/GoldenrodGameCorner.asm b/maps/GoldenrodGameCorner.asm
index 6cc8317c9..6dd9b6326 100644
--- a/maps/GoldenrodGameCorner.asm
+++ b/maps/GoldenrodGameCorner.asm
@@ -364,14 +364,29 @@ GoldenrodGameCornerPrizeVendorNoCoinCaseText:
 	done
 
 GoldenrodGameCornerPharmacistText:
+if DEF(_CRYSTAL_AU)
+	text "This machine looks"
+	line "the same as the"
+	cont "others."
+	done
+else
 	text "I always play this"
 	line "slot machine. It"
 
 	para "pays out more than"
 	line "others, I think."
 	done
+endc
 
 GoldenrodGameCornerPokefanM1Text:
+if DEF(_CRYSTAL_AU)
+	text "These machines"
+	line "seem different"
+
+	para "from the ones at"
+	line "CELADON CITY!"
+	done
+else
 	text "I just love this"
 	line "new slot machine."
 
@@ -379,16 +394,28 @@ GoldenrodGameCornerPokefanM1Text:
 	line "challenge than the"
 	cont "ones in CELADON."
 	done
+endc
 
 GoldenrodGameCornerCooltrainerMText:
+if DEF(_CRYSTAL_AU)
+	text "Nothing is certain"
+	line "in this area."
+	done
+else
 	text "Life is a gamble."
 	line "I'm going to flip"
 	cont "cards till I drop!"
 	done
+endc
 
 GoldenrodGameCornerPokefanFText:
 	text "Card flip…"
 
+if DEF(_CRYSTAL_AU)
+	para "Different from the"
+	line "other machines."
+	done
+else
 	para "I prefer it over"
 	line "the slots because"
 
@@ -398,6 +425,7 @@ GoldenrodGameCornerPokefanFText:
 	para "But the payout is"
 	line "much lower."
 	done
+endc
 
 GoldenrodGameCornerCooltrainerFText:
 	text "I won't quit until"
@@ -416,6 +444,12 @@ GoldenrodGameCornerGentlemanText:
 	done
 
 GoldenrodGameCornerPokefanM2Text:
+if DEF(_CRYSTAL_AU)
+	text "COIN CASE? I threw"
+	line "it away in the"
+	cont "UNDERGROUND."
+	done
+else
 	text "I couldn't win at"
 	line "the slots, and I"
 
@@ -428,6 +462,7 @@ GoldenrodGameCornerPokefanM2Text:
 	para "COIN CASE in the"
 	line "UNDERGROUND."
 	done
+endc
 
 MoveTutorInsideText:
 	text "Wahahah! The coins"
diff --git a/mobile/stadium/stadium2_3.bin b/mobile/stadium/stadium2_3.bin
new file mode 100644
index 000000000..79cb83ac0
Binary files /dev/null and b/mobile/stadium/stadium2_3.bin differ
diff --git a/roms.sha1 b/roms.sha1
index 3cdf981f6..d63d39632 100644
--- a/roms.sha1
+++ b/roms.sha1
@@ -1,2 +1,3 @@
 f4cd194bdee0d04ca4eac29e09b8e4e9d818c133 *pokecrystal.gbc
 f2f52230b536214ef7c9924f483392993e226cfb *pokecrystal11.gbc
+a0fc810f1d4e124434f7be2c989ab5b5892ddf36 *pokecrystal-au.gbc