The Sanctuary, where you can talk to the ghosts of bosses you've defeated, is accessible through the left door of Emporio's Room. Fans of the SaGa series will recognize it as the final boss room from the very first SaGa/Final Fantasy Legend game, which the spriting style of 7th Stand User is based off of. Besides chatting with the ghosts, there are a couple extra events and boss fights here that you can access once your level is high enough.
You'll also be booted to this room if you fail the final confrontation with Vins. You will be unable to leave the room, but can talk with any of your party members that died, see some different dialogue from Dio's followers (N'Dour, Kate, and Amber, for example), and return to the title screen using the door to the afterlife on the right side.
Near the bottom-right corner of the map, there's an orb. If Abdul, Kakyoin, Joseph, or Polnareff's level is 40 or above, you can bring them here for a boss fight. Winning the fight will grant you +3 FP with that party member and a Badge of Honor. (Once Abdul, Kakyoin, and Polnareff have triggered this event, the other two will be barred from it until the next playthrough, but Joseph's event can be triggered regardless.)
The God-Slaying Axe
After defeating Alessi, talk to him, and he may reveal the location of his axe. Check a certain spot in the river to start a boss fight by choosing the middle dialogue option. Winning will give you an item that will make the following battle with the Creator substantially easier. If Joseph is in your party, the dialogue prior to the fight changes.
If Jotaro's level is above 40, talking to the man who shares Speedwagon's sprite will start a battle. Defeating him will cause him to disappear, allowing access to the door behind, which leads to the Debug Room. Note that he will respawn if you leave the room.
(Note: The dialogue in this battle is a reference to the final battle of The Final Fantasy Legend. There is a glitch in that game that allows the Creator to be insta-killed with a Chainsaw, which is why the item from the event above can be used to defeat him, and also why he will bar you from using Joykiller or Carpenters' Chainsaw attack. The Creator's sprite is ripped directly from the game, and despite the striking similarities, he has nothing to do with Speedwagon.)
|Name||HP||EXP Given||Dropped Money||Dropped Items||Notes|
|EXTRA BOSS: Cars||9999||10,000||9999||Cars' Right Arm||Range: S. Power, Durability, Spirit, and Speed are all 999. At the beginning of the battle, he will (mostly) only laugh and provoke you, but as you damage him, he will start to fight back with his Light Blades, which attack everyone in the party and have a chance to 1HKO. Also has Revive, which heals 999 HP. Can inflict Blind, Berserk, and Fear. In addition to Cars' Right Arm, you will receive a Badge of Honor once the battle ends.|
|EXTRA BOSS: Wham||8000||10,000||9999||Badge of Honor||Range: S. Power and Durability are 1.5x that of Shadow Dio, but his Spirit and Speed are 999. Uses strong Wind elemental attacks such as Holy Sandstorm, can Camoflauge to inflict LookBack and Fear, and use Revive to restore 999HP, his moves have a chance of 1HKO. The battle will likely be a question of how long the Ripple status ailment from Joseph's attack persists, as well as how often he decides to use Refresh.|
|EXTRA BOSS: Shadow Dio||6000||5000||3000||Badge of Honor||Range: S. His base stats are slightly higher than regular Dio's. Once his HP gets low, he will start to break out 1HKO attacks. In addition, once he hits half HP, he will gain the ability to use The World twice in a row. He also uses flesh buds but its not really something to worry about because its really just a renamed confused status.|
|FINAL FANTASY LEGEND BOSS: Creator||9999||99,999||999,999||-||Possesses extremely high stats, powerful elemental attacks, and immunity to all status effects except for OffGuard - he is a god, after all. If you have Cars' Right Arm, you can end the battle instantly. In addition, he's able to be affected by Star Platinum: The World (can be purchased from the vending machines in the Developer's Room.
After the game is cleared 3 times, Creator has a chance to become immune to Stop Time. This chance increases every time the game is cleared, with Creator becoming immune to it after the game is cleared 10 times.
|ULTIMATE BOSS: Ult. Being Cars||9999||10,000||9999||Cars' Right Arm||This version of Cars can be fought on the 2nd playthrough and up. Stats are the same, but he will recover 999HP each turn. In addition, he is no longer weak to Light damage, and cannot be afflicted with BlowBack, OnFire, Berserk, or NoSenses. He will use Absorb Flesh to steal your HP and SP, and once his health gets low enough, he will use Evolve to even further buff his stats.
He will recover 100SP each turn, so he cannot run out. However, due to a bug in RPG Maker 2000's AI system, once it hits 0, he will act as if he has no SP left even after recovering, and will not be able to absorb or use his Light Blades.
If you're lucky, you will receive a Red Stone of Aja after the battle.