Ghost Grey Post-Game & All Three Endings: Full Guide

Spoilers. This page describes the entire post-game, including its structure and its endings. Ghost Grey's developers advise playing blind the first time. If that matters to you, stop here. Story spoilers from the main game -- the League's dark turns and the choices behind them -- are collected separately on the spoilers page.

Short answer: Ghost Grey's post-game starts the instant the credits finish and runs for about three hours. It takes you out of Kanto to Johto, sends you through Cerulean Cave, a lost forest, Treasure Island and a casino-themed dungeon where Wario steals your money, and it ends with thirteen consecutive boss battles and three different endings. No text guide for any of this exists -- this page is built from a complete v1.0.4 playthrough plus the ROM's own data.

How we know any of this

Ghost Grey's post-game is not documented in prose anywhere. What we have is:

• A complete v1.0.4 playthrough, published in October 2026 and just under eleven hours long, with a chapter list covering the main story and the whole of the post-game.
• The ROM's own data: static encounters, gift Pokémon, key items, item placements and the area list.
• Community reports, where cited.

Where we are inferring rather than reporting, this page says so.

You need the GrySoulstone

The ROM stores the GrySoulstone -- players call it the Grey Soulstone -- as a key item, as a gift, and the gift site is the Desert Palace. The playthrough's own note is blunt: you get it by solving all of the palace's puzzles, and it is collected about an hour before you face the Elite Four and four hours before the post-game even begins.

Community reports agree that this is the item that opens the post-game islands. Its item description reads: "A grey stone imbued with the souls of thousands before you. It beckons..."

Do not finish the main story without it. It is the one post-game prerequisite that is easy to walk past, because it sits in a mid-game area you have no other reason to revisit.

The post-game opens

The Hall of Fame screen rolls, the credits finish, and the post-game begins immediately. In order, that opening stretch runs: a second Hall of Fame listing showing previous runs; Professor Oak's Notebook; the secret room, whose passwords you read from dialogue; the battle with Lillie; Gold's Mom; a final battle with your rival Summer; Trainer Red turning up; Lillie's vacation house; and then the trip to Johto.

Lillie is here, which is a strange sentence to write about a Kanto game set decades after Gold and Silver, and Red turns up as well. Both are treats rather than obstacles. The second Hall of Fame listing is worth reading properly if you have played the hack before -- it is not decoration.

The post-game proper starts after Johto, and it is enormous. The areas below are in the order the reference playthrough reaches them.

The post-game areas

Saffron Stadium. A gauntlet against every Trainer in the building. There is nothing to collect here; it is back-to-back fights and a real level check.

Cerulean Cave. Home of the post-game's strongest wild Pokémon. The ROM places four items inside: a PP Up, a Twisted Spoon, a Ghost Ball and a Gansito. Sabrina is waiting in the cave rather than in a gym, which is a fair summary of what has happened to Kanto's institutions by 2049.

Northern Cave. The post-game's treasure room, and the single most rewarding detour on this list. The ROM hides all six of the hack's own evolution stones here -- Abyss Stone, AvariceStone, Dusk Stone, HarvestStone, Moon Stone and Sun Stone -- alongside a Loose Gem that sells for ¥5,000, a Master Ball sitting on the ground, and a King's Rock.

Alyce. Give her the Bone Brush and she battles you.

The Safari Zone. The missing boy, Dezo -- and his mother, later.

Route 22 and Route 23. A hidden wall, and the WinnerTrophy behind it: "A radiant trophy of solid gold. It was awarded to someone who is number 1." The ROM files the trophy on Route 23 and files HM03, HM06 and HM07 in this stretch, so treat the two routes as one leg.

The Bottle Cap vendor. A Bottle Cap costs 70,000 here. The ROM separately records a Bottle Cap as a gift in Celidon City, so if you only want one for the IV system, that is the cheaper route.

One Island and the Old Cartridge. This is where the stone from the Desert Palace gets used -- the playthrough's own label for it is the Greystone, while the ROM's key item is the GrySoulstone. The OldCartridge you have been carrying since the palace finally does something here: "An old plastic cartridge of some kind. What in the world could this be used for?"

MissingNO. A boss battle, and a very deliberate choice of name.

The Rare Jigglypuff. A hunt in its own right rather than a fight you stumble into: the ROM's static table puts a Lv 50 Jigglypuff in Smeraldopoli, and the playthrough goes out of its way for it.

The Lost Forest. Where the Fairy Bow is handed to you as a gift, and the ROM's description of the bow is a hint rather than decoration: "A bow and arrow. Works how you'd expect. There's a strange triangle on it." The same area holds a Moon Stone, a Lax Incense, a Sea Incense, a Rare Candy and a Mooncake. The playthrough collects four "Small Keys" here; our item table does not record items under that name, so treat those as its own labels for the puzzles rather than as inventory you should expect to see.

Treasure Island. Fifteen placements, and the best junk in the game: an AvariceStone, a Star Stone that sells for ¥20,000, a Black Belt, Truck Nutz ("brings good luck and boosts the critical hit ratio"), a Gold Tooth worth ¥7,500, a Devil's Deal ("the holding Pokémon may endure an attack, leaving just 1 HP"), a Luxury Ball and a spread of snacks.

Castle of Greed. The casino dungeon, twenty-one placements including two of the best hidden items in the game: a hidden Loose Gem and a hidden Master Ball. There is also an AvariceStone, an Amulet Coin, Choice Specs and a wallet full of someone else's money. Wario is here. He takes your money afterwards -- the playthrough's own note reads "RIP my MONEY (WARIO STOLE IT WTF)", and that is the entire review.

A computer. Defeat every virus in it.

Parts Unknown. One of the richest stretches in the post-game, with eighteen placements: a hidden Chocosongi ("A chocolate mushroom cap covering a cookie. Heals 30 HP in battle"), an Iron Nail (a held item that makes Steel-type moves stronger), a Loose Gem, TM42 Sleep Talk as a gift, a hidden Wallet, plus a Gold Tooth, a Dream Bar, a Mooncake, a Pepero, a Pumpkin Pie and two berries.

The Abyss. A separate map, and mostly a shop: nine purchases, one hidden Macaron, and a Lv 5 Togepi available as an egg. This is the stretch where the playthrough's own note reads "literally had to WAIT", and it is also where the stair positions from earlier start mattering.

The sacrifice. You have to prepare a Pokémon to be sacrificed. It is a real cost, not a cutscene.

Ierie. An encounter the playthrough flags with an exclamation mark of its own, and the ROM records an Ierie as a static Pokémon at Lake Lucidus.

The secret door. Remember the positions of the stairs. You need them twice -- later you are told to drop into a hole based on where those stairs were, and the game does not repeat itself.

Agatha. Turn the way she does not, battle her, then use the Grey Orb in the Tomb. The ROM stores the Grey Orb as a hidden item in the Fuji Catacombs, which is where you will have walked past it.

The post-game's best loot, and where the ROM records it

The final gauntlet

The point of no return is explicit: the game asks whether you are ready, and says that once you say yes, you can never go back to the world. After that it is thirteen boss battles back to back, against a run of enemies the player had to bring a purpose-built team for.

Between them sits a curiosity worth knowing about. One of the final opponents is numbered 7 in the game's own UI -- the playthrough's note is literally "7 (yes it's literally SEVEN)" -- and it is followed by the Super Cool Yam Battle. Ghost Grey's developers also made a game called SUPER Cool Spot Version, so this is a joke aimed at people who were paying attention.

The three endings

The run closes with three endings in sequence: two in quick succession and a third that the playthrough labels as the true ending.

We do not know what the endings are, and we are not going to guess. What the route does establish is the kind of things that plausibly branch:

• Kill or spare Takeshi, in the main story.
• Two explicit trap choices, both noted in the playthrough as "DON'T DO IT".
• Whether you buried Dezo and returned his card, which is a key item carried through the whole game.
• Whether you gave Alyce the Bone Brush.

That list is a hypothesis about where the branches live, not a solution. If you work out the actual conditions, tell us and we will write them up properly.

The secret room

There is a secret room that requires passwords you read from dialogue, and the playthrough deliberately does not reveal them, out of respect for the developers. The player's own summary: finding the passwords is not hard as long as you read what the game tells you, and the reward is "really what I never expected."

We are not spoiling it either. Read the dialogue.

Legendary and static Pokémon

Ghost Grey places 28 static encounters, plus 16 gift Pokémon and 3 eggs. This is the list the ROM carries, with levels.

That list includes Giratina, Hoopa, Marshadow, Pecharunt and Spectrier -- several of which the reference playthrough met during the post-game. It also includes a spread of hack-original species (Amy, Beth, Ierie, Joelle, Meg, Eyeron, Bogmire, Stalfos, Minotauros, Regiscream) that you will not find in any official game.

There is no roaming table in this ROM: everything in the list above is fixed, so you can plan a run around a specific legendary rather than hoping.

What this guide does not claim

It does not give you ending conditions, puzzle solutions, password answers, or the contents of the secret room's reward. It does not claim the area order is forced -- that is one player's route through optional content, and the playthrough itself says it missed legendaries and side quests.

It also cannot tell you which of these areas are post-game only, because our location data does not record when an area unlocks, and it does not carry item lists for every area the playthrough visits.

Related: the walkthrough, key items, item locations, the evolution guide, getting started, and the 100% checklist if you would rather work through the post-game as tick boxes.