How to Download and Install Pokémon Prism Safely

Pokémon Prism is distributed as a patch for Pokémon Crystal rather than as a complete Game Boy Color ROM. To install it, you need the official Pokémon Prism files from RainbowDevs, a clean English copy of Pokémon Crystal that you legally obtained yourself, and a compatible Game Boy Color emulator.

The installation process is a little different from many Pokémon ROM hacks. Prism uses a BSP patch named pokeprism.bsp, and RainbowDevs provides its own browser-based patcher as well as a local patcher inside the downloaded package. The official patcher can also update existing Pokémon Prism save files when a new version is released.

As of August 2026, the current official release is Pokémon Prism 0.95.0254, released on August 24, 2023. RainbowDevs still lists that build as the latest version on the official Pokémon Prism page.

Prism is also still officially described as being in beta, so RainbowDevs recommends keeping regular backups of your save file while playing.

Rom Professor does not provide, host, or link to copyrighted Pokémon Crystal ROM files or pre-patched Pokémon Prism ROMs. This guide explains how to use the official Prism patch with a clean copy of Pokémon Crystal you legally obtained yourself.

What You Need Before Installing Pokémon Prism

You need:

• The current official Pokémon Prism download from RainbowDevs
• A clean English Pokémon Crystal ROM
• Either Pokémon Crystal version 1.0 or version 1.1
• A compatible Game Boy Color emulator
• A program capable of extracting the downloaded ZIP file
• A safe place to back up your Prism ROM and save files

The most important thing to understand is that the Pokémon Prism download is not a complete Pokémon Crystal game.

RainbowDevs distributes the changes that transform Crystal into Prism.

You supply the original Pokémon Crystal game yourself.

The official Prism package contains the patching files, including:

pokeprism.bsp

and a local version of the Prism patcher.

The end result of the process is a playable Game Boy Color file, normally:

pokeprism.gbc

That .gbc file is what you open in your emulator.

What Base ROM Does Pokémon Prism Use?

Pokémon Prism requires an English Pokémon Crystal ROM.

Unlike many ROM hacks that require one exact revision, RainbowDevs officially supports both:

Pokémon Crystal v1.0

and:

Pokémon Crystal v1.1

The file should have a:

.gbc

extension.

That makes Prism somewhat easier to patch than hacks that require one exact checksum.

You do not need to find a specially modified Crystal ROM.

You want a normal, clean English copy of the original game.

Do not use:

• Pokémon Gold
• Pokémon Silver
• A Japanese Pokémon Crystal ROM
• A translated Crystal ROM
• Pokémon Crystal Clear
• Polished Crystal
• Another Crystal ROM hack
• An existing Pokémon Prism ROM
• A Crystal ROM that has already been modified
• A save file instead of the actual .gbc game
• A compressed ZIP or 7Z file instead of the extracted ROM

RainbowDevs explicitly states that both English Crystal 1.0 and 1.1 are acceptable.

This also matters when updating Prism.

You cannot use your existing pokeprism.gbc as the base for a newer Prism patch. You must return to a clean English Pokémon Crystal ROM and apply the new Prism patch to that file.

Keep an untouched backup of your clean Crystal ROM somewhere safe.

That way, whenever Prism receives another update, you already have a known-good base.

Rom Professor does not provide or link to Pokémon Crystal ROM downloads.

Where to Get the Official Pokémon Prism Patch

The best place to download Pokémon Prism is directly from RainbowDevs, the team that has maintained the project since 2016.

The official game page is:

Pokémon Prism on RainbowDevs

The page lists:

Latest Version: 0.95.0254

Release Date: August 24, 2023

Format: BSP Patch

and provides both the patch download and the official setup instructions.

RainbowDevs also maintains an archive of older releases, but those older builds are provided primarily for archival and troubleshooting purposes. The developers specifically warn that old releases can contain crashes, softlocks, and other bugs that have already been fixed.

For a normal new playthrough, use the latest release, not an archived version.

Avoid searching for something like:

Pokemon Prism ROM download

or:

Pokemon Prism pre-patched GBC

Random pre-patched copies create several problems.

You may have no reliable way to know:

• Which Prism version is installed
• Whether the ROM has been modified
• Whether it contains an old beta
• Whether unofficial cheats or changes were added
• Whether the file has known save-corruption bugs
• Whether the seller or website is distributing the project with the developers’ approval

RainbowDevs does not distribute a complete copyrighted Pokémon Crystal ROM. Its website uses a patcher that modifies a file you provide locally.

How to Patch Pokémon Prism

Pokémon Prism’s official installation process uses the patcher supplied by RainbowDevs.

You can run it directly through the RainbowDevs website or use the local copy included inside the Prism download.

Step 1: Download the Latest Pokémon Prism Release

Open the official Pokémon Prism page.

Download the latest version.

As of August 2026, that is:

Pokémon Prism 0.95.0254

The official download currently points to the 0.95.0254 release package.

Do not try to import the entire downloaded ZIP directly into your emulator.

You need to extract it first.

Step 2: Extract the Pokémon Prism ZIP File

Locate the downloaded Prism archive.

Extract it to its own folder.

RainbowDevs specifically warns players to extract the ZIP before attempting to patch.

Inside the extracted files, locate:

pokeprism.bsp

This is the Pokémon Prism patch.

You may also see:

patcher_unified.htm

That is a local copy of RainbowDevs’ patching tool.

Step 3: Prepare Your Pokémon Crystal ROM

Locate your clean English copy of Pokémon Crystal.

It should end in:

.gbc

Either Crystal 1.0 or Crystal 1.1 is acceptable.

For example:

Pokemon Crystal.gbc

Make a backup before modifying anything.

You should ideally have:

Pokemon Crystal CLEAN.gbc

stored somewhere separately.

That clean copy can then be reused for future Prism updates.

Step 4: Open the Pokémon Prism Patcher

You have two official options.

You can use RainbowDevs’ browser patcher.

Or you can open:

patcher_unified.htm

from the extracted Prism download.

RainbowDevs specifically provides both methods.

Using the online patcher is usually easiest.

Step 5: Select pokeprism.bsp as the Patch File

In the patcher’s Patch File section, choose:

pokeprism.bsp

Make sure you do not accidentally select your Pokémon Crystal ROM here.

The BSP file contains the changes that turn Crystal into Prism.

Step 6: Select Pokémon Crystal as the Input File

In the Input File section, choose your clean Pokémon Crystal .gbc.

Remember:

Patch File: pokeprism.bsp

Input File: clean Pokémon Crystal .gbc

If those are reversed, the process will not work.

Step 7: Begin Patching

Select:

Begin Patching

RainbowDevs’ patcher will analyze the files.

For a new game, choose:

Release ROM

when prompted.

Step 8: Download the Finished Pokémon Prism ROM

After processing finishes, select:

Get file

The resulting file is your Pokémon Prism game.

The normal filename is:

pokeprism.gbc

Save it somewhere easy to find.

That is the file you will open in your emulator.

You no longer need to feed pokeprism.bsp into the emulator.

Step 9: Open pokeprism.gbc in Your Emulator

Launch your compatible Game Boy Color emulator.

Open:

pokeprism.gbc

If the Pokémon Prism title screen appears, the ROM was patched successfully.

Start a game, save normally, close the emulator, and open the game again once to verify that your save file is being created correctly.

How to Play Pokémon Prism on Windows, Mac, Android, and iPhone

Pokémon Prism is a Game Boy Color hack, so you need a Game Boy/Game Boy Color emulator, not a GBA-only emulator.

RainbowDevs officially recommends accurate emulation and specifically warns players not to use VisualBoyAdvance or VBA-M for Prism. The developers state that they will not support Prism bugs reported while using VBA because of its emulation inaccuracies.

Windows

RainbowDevs officially recommends several desktop emulators.

The primary choices include:

BGB

SameBoy

and:

Emulicious

BGB is one of RainbowDevs’ primary Prism recommendations.

SameBoy is another excellent option and runs on multiple desktop operating systems.

Emulicious is a multi-system emulator that runs through Java.

For most Windows players, I would start with BGB or SameBoy.

The process is simple:

1. Install the emulator.
2. Open it.
3. Select pokeprism.gbc.
4. Configure your controller or keyboard.
5. Start playing.
6. Make a normal in-game save.

Mac

For Mac, SameBoy is the easiest recommendation.

RainbowDevs lists SameBoy as a supported emulator and specifically notes that it runs on macOS.

You can technically run BGB through compatibility tools such as WINE or CrossOver, but there is little reason to complicate things when SameBoy has native macOS support.

Once SameBoy is installed:

1. Open SameBoy.
2. Load pokeprism.gbc.
3. Configure your controls.
4. Start playing.

Linux

SameBoy is also a good choice for Linux.

Emulicious is another option if you already have a Java environment configured.

BGB can run through WINE, but again, SameBoy is generally simpler.

Android

RainbowDevs’ official setup guide focuses primarily on its supported desktop emulators, so Android options are more community-driven.

Recent Prism players in 2026 report successfully using:

Pizza Boy C

and:

My OldBoy!

RetroArch using an accurate Game Boy Color core such as SameBoy is another reasonable option.

The process is:

1. Patch Prism using the official RainbowDevs process.
2. Copy pokeprism.gbc to your Android device.
3. Open your GBC emulator.
4. Locate pokeprism.gbc.
5. Start the game.
6. Make a normal in-game save.

If one Android emulator behaves strangely, test the same ROM and save in another emulator before assuming the Prism patch itself is damaged.

iPhone and iPad

Pokémon Prism can run through Delta on iPhone and iPad.

A very recent August 2026 Prism community discussion confirmed that the current .gbc file works in Delta. The main confusion came from trying to import the original Prism ZIP instead of first patching Pokémon Crystal and importing the finished .gbc file.

The easiest method is:

1. Patch Prism first.
2. Transfer pokeprism.gbc to your iPhone.
3. Open Delta.
4. Press the + button.
5. Choose Files.
6. Select pokeprism.gbc.

RainbowDevs community support has also recommended enabling Delta’s save backup feature so your saves are copied to cloud storage automatically.

Do Not Use VisualBoyAdvance for Pokémon Prism

This warning deserves to be repeated.

Do not use VisualBoyAdvance or VBA-M for Pokémon Prism.

RainbowDevs explicitly tells players not to use either emulator and will not support bugs reported from them because of emulation accuracy problems.

If Prism gives you a white screen, crashes, has strange audio, or behaves unpredictably in VBA, switch emulators before repatching the game.

Try:

• BGB
• SameBoy
• Emulicious

first.

Best Emulator Settings for Pokémon Prism

Pokémon Prism generally does not require a huge list of custom emulator settings.

The biggest issue is emulator accuracy.

Use one of the recommended emulators and leave most settings at their defaults.

A good baseline is:

Setting	Recommendation
Emulator	BGB or SameBoy
System	Game Boy Color
ROM extension	.gbc
Save method	Normal in-game saves
Save states	Fine for convenience, but not for updating
VBA/VBA-M	Do not use
Save backups	Strongly recommended

RainbowDevs emphasizes regular save backups because Prism is still officially considered a beta release.

Do Not Depend on Save States

Save states are useful during normal play.

But they are not a substitute for your actual Prism save file.

This matters especially when you update Prism.

The Prism update system works with the actual:

.sav

file.

RainbowDevs’ documentation explicitly states that save states will not work for the update process.

Use Prism’s normal in-game save menu regularly.

Keep Backups of Your .sav File

Your Prism save will normally be something like:

pokeprism.sav

Back it up occasionally.

Make an extra backup before:

• Updating Prism
• Moving to another emulator
• Moving to another phone or computer
• Renaming the ROM
• Testing cheats
• Playing on unusual hardware
• Modifying the game

Prism has a large amount of progression, so losing a save can mean losing dozens of hours.

How to Update Pokémon Prism Without Losing Your Save

Pokémon Prism has one of the more unusual update procedures among Pokémon ROM hacks.

You do not simply patch a new ROM and copy your old .sav next to it.

The Prism patcher can also patch and migrate the save file itself.

RainbowDevs provides very specific instructions, and you should follow them exactly.

Step 1: Save Inside a Pokémon Center

Before updating, open your current Pokémon Prism game.

Enter any Pokémon Center.

You must be standing in the main room of the Pokémon Center.

Do not save in the back room.

Make a normal in-game save there.

RainbowDevs refers to Pokémon Centers as designated safe areas for Prism updates because map data can change between builds. Updating while your character is standing elsewhere can leave the save in an invalid location and potentially make it unrecoverable.

This is not an optional suggestion.

Save inside the main room of a Pokémon Center before updating.

Step 2: Close the Emulator

After making the normal in-game save, close Prism completely.

Do not continue playing after creating the update save.

Step 3: Back Up Your Existing ROM and Save

Locate:

pokeprism.gbc

and:

pokeprism.sav

Copy both files to a separate backup folder.

For example:

Prism Backup Before Update

Do not edit those backup copies.

RainbowDevs specifically warns about the risk of complete data loss during the update process if files are not backed up.

Step 4: Download and Extract the New Prism Release

Download the newest official Prism version.

Extract the ZIP.

Locate the new:

pokeprism.bsp

Do not use an old patch file by accident.

Step 5: Patch a Clean Pokémon Crystal ROM

Open the RainbowDevs patcher.

Under Patch File, select:

pokeprism.bsp

Under Input File, select your clean Pokémon Crystal ROM.

Do not select your current Pokémon Prism ROM.

RainbowDevs explicitly says:

You must use clean Pokémon Crystal, not your existing Prism file.

Begin patching.

Select:

Release ROM

Then:

Get file

You now have the updated Prism ROM.

Step 6: Replace Your Existing pokeprism.gbc

Replace your old:

pokeprism.gbc

with the newly created file.

Do not delete your backup copy yet.

Step 7: Leave pokeprism.bsp Loaded in the Patcher

Now comes the part that makes Prism different from most hacks.

Leave:

pokeprism.bsp

selected as the Patch File.

Instead of loading Pokémon Crystal into the Input File section, select your existing:

pokeprism.sav

save file.

Step 8: Patch Your Prism Save File

Select:

Begin Patching

The patcher should detect that you supplied a Prism save file.

Confirm when prompted.

Then choose:

Get file

The patcher produces an updated save file.

Replace your old:

pokeprism.sav

with the newly patched save.

Again, keep the backup.

Step 9: Launch the Updated Game

Open the new:

pokeprism.gbc

Your updated save should load normally.

Step 10: Immediately Walk Outside the Pokémon Center

RainbowDevs gives one final instruction after updating.

When the game loads:

Walk directly outside the Pokémon Center without talking to anyone.

Then save the game again.

Once that new save completes, the update process is finished.

That may sound overly specific, but Prism’s patcher is designed around safe migration points.

Follow the developers’ instructions rather than improvising.

Can Old Pokémon Prism Saves Be Updated?

Prism’s update system was specifically designed to preserve saves between RainbowDevs versions by modifying the save data as necessary.

The current RainbowDevs wiki instructs players with existing saves to patch the .sav file using the same pokeprism.bsp update package.

However, do not assume that means you can skip versions indefinitely or ignore future release instructions.

Before any future update:

1. Check the newest RainbowDevs setup page.
2. Read the release notes.
3. Save inside a Pokémon Center.
4. Back up everything.
5. Patch both the clean Crystal ROM and the Prism .sav.

If Prism 0.96 or another major update eventually releases, follow the new instructions supplied with that version rather than assuming the 0.95 process will remain unchanged.

Common Pokémon Prism Installation Problems

“The Pokémon Prism patch won’t work”

First verify that you are using:

• An English Pokémon Crystal ROM
• Crystal version 1.0 or 1.1
• A .gbc file
• The current pokeprism.bsp
• The RainbowDevs Prism patcher

Do not use another ROM hack as the base.

Do not use your old Prism ROM when creating a new build.

If the patcher continues to reject the file, try another clean dump of your own Pokémon Crystal cartridge.

“Do I need Pokémon Crystal 1.0 or 1.1?”

Either.

RainbowDevs officially supports both:

1.0

and:

1.1.

This is one of the nice things about installing Prism.

You do not need to hunt for one exact revision as long as you have a clean English Crystal ROM.

“My emulator won’t open pokeprism.bsp”

That is normal.

pokeprism.bsp

is not the finished game.

It is the patch file.

You use it with Pokémon Crystal to create:

pokeprism.gbc

Your emulator opens the .gbc.

“I downloaded Pokémon Prism but Delta won’t open it”

You probably tried to import the ZIP or BSP patch directly.

This exact confusion was still occurring among Prism players in August 2026.

You need to:

1. Extract the Prism ZIP.
2. Apply pokeprism.bsp to Pokémon Crystal.
3. Download the resulting .gbc.
4. Import that .gbc into Delta.

“Pokémon Prism only gives me a white screen”

Check your emulator first.

If you’re using:

VisualBoyAdvance

or:

VBA-M

switch to something else.

RainbowDevs specifically warns against both emulators.

Try:

BGB

or:

SameBoy

If the same Prism ROM works there, your patch was probably fine.

“Prism crashes or acts strangely in VBA”

Again, switch emulators.

Do not spend hours changing settings inside VBA trying to make Prism behave.

The developers explicitly consider VBA too inaccurate to support for Prism.

“My save disappeared after renaming Pokémon Prism”

Your emulator may associate save files with ROM filenames.

For example:

pokeprism.gbc

and:

pokeprism.sav

match.

But if you rename the ROM to:

Pokemon Prism 0.95.gbc

while leaving the save as:

pokeprism.sav

some emulators may treat the newly named ROM as a different game.

Make a backup.

Then make the ROM and save filenames match if your emulator requires it.

For example:

Pokemon Prism 0.95.gbc

Pokemon Prism 0.95.sav

“I updated Prism and my save doesn’t work”

Do not keep playing or create a new save over the file.

Check whether you followed the Prism-specific update procedure.

You must:

1. Save inside the main room of a Pokémon Center.
2. Back up the ROM and save.
3. Patch a clean Pokémon Crystal ROM.
4. Replace your Prism ROM.
5. Patch the .sav file separately using pokeprism.bsp.
6. Replace the save.
7. Start Prism.
8. Walk directly outside.
9. Save again.

Simply moving the old .sav next to the new ROM may not be sufficient when the save format requires migration.

“Can I use a save state from an older Prism version?”

Do not use a save state as your update method.

RainbowDevs specifically states that save states do not work for Prism’s update process.

Use the normal .sav created through Pokémon Prism’s in-game save system.

“The patcher says my save needs patching”

That is expected when moving between Prism builds that require save migration.

The Prism patcher is designed to identify and update save files.

The 0.95.0254 changelog even includes an improvement to the message shown when Prism detects that a save file needs to be patched.

Back up the save and follow RainbowDevs’ update process.

“I accidentally patched my old Pokémon Prism ROM instead of Crystal”

Start over using the clean Pokémon Crystal base.

Do not try to repair the double-patched Prism file.

Keep your save backed up, create a fresh Prism ROM from Crystal, and then patch your save properly if you are updating.

“My Prism save is corrupted”

Stop using that file immediately and make a copy before experimenting.

Try your most recent backup.

If you’re playing a beta ROM hack as large as Prism, occasional save backups are extremely important.

RainbowDevs explicitly recommends regular backups because Prism remains in beta.

Pokémon Prism on Real Hardware

Pokémon Prism can run on real Game Boy hardware.

RainbowDevs lists support for platforms including:

• Game Boy
• Game Boy Pocket
• Game Boy Color
• Game Boy Advance
• Game Boy Micro
• Nintendo DS

The Prism setup guide also notes that players can use compatible flash hardware or Nintendo 3DS Virtual Console setups, although the developers cannot guarantee every possible hardware combination will behave correctly.

One particularly important warning involves the Analogue Pocket.

RainbowDevs published a PSA after receiving reports of Prism save corruption when playing from physical cartridges on Analogue Pocket. The reported corruption could permanently damage save data, including Pokémon stored in PC boxes. Later testing suggested the problem was primarily affecting cartridges, while EverDrive, EZ-FLASH Junior, and openFPGA methods had not shown the same issue at that time.

Because hardware and firmware can change, check RainbowDevs’ latest guidance before putting an important Prism save onto an Analogue Pocket.

And regardless of hardware:

Back up your save.

How to Verify That Pokémon Prism Installed Correctly

Launch the finished:

pokeprism.gbc

You should see the Pokémon Prism game rather than the normal Pokémon Crystal title screen.

Then verify the installed version.

As of August 2026, the official release should report:

0.95.0254

RainbowDevs’ official game page identifies that as the latest version and lists its release date as August 24, 2023.

After confirming the game version:

1. Start a new game.
2. Play until you can save.
3. Use the normal in-game save command.
4. Close the emulator completely.
5. Reopen pokeprism.gbc.
6. Confirm that your save appears.
7. Load it.

If the correct Prism version starts and your normal save survives a complete restart, your basic installation is working.

Do not wait ten hours to discover that your emulator was never writing battery saves properly.

Test it immediately.

Pokémon Prism Installation FAQ

Is Pokémon Prism free?

Yes. RainbowDevs distributes the Pokémon Prism project for free.

You still need your own legitimate copy of the required Pokémon Crystal base game.

What is the latest version of Pokémon Prism?

As of August 2026, the latest official version is:

Pokémon Prism 0.95.0254

It was released on August 24, 2023.

Check our Pokémon Prism latest version guide for future updates and version-specific changes.

Is Pokémon Prism still being updated?

RainbowDevs has continued to maintain the project and has stated that development beyond 0.95 exists, although 0.95.0254 remains the public version as of August 2026.

Recent community discussion in May 2026 still described development as active.

Do not download something claiming to be “Prism 0.96” unless RainbowDevs has officially released it.

Is Pokémon Prism complete?

Pokémon Prism contains a substantial playable adventure, but RainbowDevs still officially labels the project as beta.

For a deeper explanation of exactly what is and is not complete, see our Is Pokémon Prism complete? guide.

What base ROM does Pokémon Prism need?

Use a clean English Pokémon Crystal ROM.

Both:

v1.0

and:

v1.1

are officially supported.

What patch format does Pokémon Prism use?

The current release uses a:

BSP patch

The patch file is:

pokeprism.bsp

RainbowDevs supplies its own compatible patcher.

Do I need Lunar IPS or another patching program?

No.

The simplest method is RainbowDevs’ own Prism patcher.

You can use the online version or the:

patcher_unified.htm

file included with the Prism download.

What is the best emulator for Pokémon Prism?

RainbowDevs officially recommends:

BGB

SameBoy

and:

Emulicious.

For most desktop users, BGB or SameBoy is the easiest choice.

Can I use VisualBoyAdvance for Pokémon Prism?

You should not.

RainbowDevs explicitly tells players not to use VBA or VBA-M and does not support bugs reported while using them.

Can I play Pokémon Prism on Android?

Yes.

Community players successfully use GBC emulators including Pizza Boy C and My OldBoy!.

Patch Prism first, then open the completed .gbc file in your emulator.

Can I play Pokémon Prism on iPhone?

Yes.

Pokémon Prism works in Delta once you have created the patched .gbc file. Current August 2026 community reports confirm successful Prism play through Delta.

Do not try to import the Prism ZIP or BSP file directly.

Can I play Pokémon Prism on Mac?

Yes.

SameBoy is officially recommended by RainbowDevs and runs on macOS.

Can I play Pokémon Prism on original hardware?

Yes, with suitable flash hardware or another compatible setup.

RainbowDevs specifically notes that Prism can run on real hardware, though it cannot guarantee every flash cartridge or third-party hardware combination.

Should I buy a Pokémon Prism cartridge?

RainbowDevs does not sell or officially endorse commercial Pokémon Prism cartridges.

The developers published a PSA in 2024 explaining that physical Prism cartridges sold by third parties are not produced or endorsed by RainbowDevs.

You also have no guarantee that a third-party cartridge contains the newest Prism version.

Can I update Pokémon Prism without restarting?

Yes, Prism includes a save-migration process specifically for this purpose.

However, you must follow the official update steps:

• Save in the main room of a Pokémon Center
• Back up the ROM and save
• Patch a clean Crystal ROM
• Patch the .sav file separately
• Replace both files
• Load the game
• Walk outside immediately
• Save again

Why do I need to patch my Pokémon Prism save?

Prism changes data structures and game content between versions.

The RainbowDevs patcher can migrate your existing .sav so that it remains compatible with the newer build.

That is why Prism’s update process differs from simply replacing the ROM.

Can I use my save state when updating Pokémon Prism?

No.

Use your normal in-game .sav file.

RainbowDevs explicitly states that save states do not work for Prism updating.

Why does Pokémon Prism have a .gbc extension instead of .gba?

Pokémon Prism is based on Pokémon Crystal, which is a Game Boy Color game.

The finished Prism ROM should therefore end in:

.gbc

not:

.gba

Make sure you are using an emulator that supports Game Boy Color games.

Where should I go after installing Pokémon Prism?

Once the game is running correctly, read our Pokémon Prism beginner guide.

Prism is much larger and more mechanically ambitious than vanilla Crystal, with a new region, expanded progression, unusual mechanics, additional Pokémon, and a very different adventure structure. A quick beginner overview will help you understand what has changed before you get too far into Naljo.