GameBoy Pokémon - Celadon Version (Hack) GB ROM

[CSmith327]

Game Description:​

Hack Credits:​

Released by: TotalTS
Type: Improvement Tweaks/Extra Content/Altered Graphics
Status: Complete
Language: English
Patch Version: v1.0
Date: 30 May 2026

Source and details: https://github.com/TotalTS/pokeceladon/

Link to PokéCommunity forum thread: https://www.pokecommunity.com/threads/pokémon-celadon-version.542446/

This hack is designed as an upgrade to the original Pokémon Red, Blue, and Green, aiming to enhance the classic experience and expanding it with new content. It features a personal pick of improved graphics, restored elements, expanded events, and a post-game with new areas and challenges.

This hack is intended to be played in Super Gameboy mode to appreciate a variety of new graphics and palettes.

Features:​

CORE MECHANICS, ENHANCED GAMEPLAY & QOL

• Gender Selection.
• Skateboard: A new way to travel! Match the Bike’s speed and jump over ledges in reverse.
• Speed boost: Press B to move faster while walking, cycling, skating, or swimming.
• Field Moves: Use SURF, CUT, and STRENGTH by interacting directly with the overworld. No menus required.
• Swap Pokémon positions instantly by pressing SELECT in the party menu.
• Added a USE/QUIT prompt before throwing Pokéballs to avoid accidental throws.
• New trainer classes: Female Rocket, (from sequels) Rookie and Yujirou (from prototypes).
• There’s a new room with a healing bed in S.S. Anne.
• Trainers in Gyms now have dialogue after you earn a badge or reach the post-game.
• If you have badge(s) Guards have shorter texts on Route 23.
• Nurse at Silph Co. 9F still heals you after beating Team Rocket.
• Restored PC on Celadon Hotel.
• You can use the Phone to call Mom at Celadon Mart 1F.

UPGRADED GRAPHICS

• New sprites, new palettes, Gen 2-style party icons, custom Super Gameboy border.
• Unique surfing sprites for Lapras and Pikachu.
• New Oak intro sprite.

OPTIONAL SIDEQUESTS

• Battle Yujirou early at 2nd floor of Route 22 Gate for a strategic TM19 gift!
• You can have all 3 starters like in Pokémon Yellow.
• Obtain a Rocket Suit after Nugget Bridge. Use it to skip Team Rocket battles or even steal enemy Pokémon (ends the battle instantly).
• An NPC in Rock Tunnel uses FLASH for you without needing the HM.
• If you visited Lavender Town and you have the Rocket Suit on, you can skip the Guards at the Gates of Saffron for the cost of ¥1000 Pokédollars. Without the need of giving them drinks.
• Celadon University: A new location, graduate to earn a Diploma and a unique Magikarp with Dragon Rage.
• Reunite Erik and Sara in the Safari Zone to earn a Free Pass.
• Mew under the truck.

Post-Game:​

YOUR NEW HOME

• Move out of Pallet Town! Visit the Celadon Hotel to set your new residence in any city (including the Summer Beach House on Route 19).
• Decoration: Interact with the Gameboy in your room to arrange your Pokémon Dolls.
• Visits: Your new home feels alive! Daisy might drop by for tea to heal your team, or Bill might visit to grant you access to his secret Garden.
• Pidgey Rewards: Keep an eye out for a friendly Pidgey that occasionally leaves gifts.

NEW QUESTS

• S.S. Anne: The cruise ship returns with a deck full of new trainers.
• New location: Snorlax Mountain at Route 22, (not technically a mountain, but rather a cave) where you can find wild LV. 30, 60, and 90 Snorlax.
• Rematch Gym Leaders as many times as you want (Yujiro replaces Giovanni).
• Catch all 151 Pokémon to unlock a battle against Professor Oak at the League.

ALL ACCESSIBLE AFTER SELECTING A NEW HOME AND TALKING TO BILL:

• Complete your Pokédex in brand-new “out of bounds” areas: Bill’s Garden, Mystery Cave, and extended Routes 0, 1, and 21.
• Find the Secret Long House on Route 25 to receive the Skateboard!
• Recover missed rewards with NPCs in the Mystery Cave: get the alternate Mt. Moon Fossil (Dome/Helix) and the Fighting Dojo Pokémon (Hitmonlee/Hitmonchan) you didn’t choose.
• Visit the Museum on Route 1 West to see prototype and rumored Pokémon.

VERSION EXCLUSIVES & COMPLETION

• Celadon Version is split into Red and Blue editions. While each maintains its original exclusive encounters, all 151 Pokémon are obtainable in the post-game by exploring the Mystery Cave and Bill’s Garden.

Note: for best results use an emulator with full Super Game Boy support such as Mesen, mGBA, VBA-M, or Sameboy. The bios file for Super Game Boy 2 (SGB2.sfc) will be shared by me in a comment for those that don't have it already.

​

Download Links​

• Pokémon - Celadon Version (Hack) GB ROM

 

[VampireLord1024VampireLord1024's icon]

Lol I meant to put May. How did I miss that? Thanks for pointing that out

Sure.

 

[CSmith327]

Under the Hack Credits section I noticed it says Date: 30 June 2026, so it's pretty cool to get a rom hack in the future now in the present.

Lol I meant to put May. How did I miss that? Thanks for pointing that out

 

[VampireLord1024VampireLord1024's icon]

Under the Hack Credits section I noticed it says Date: 30 June 2026, so it's pretty cool to get a rom hack in the future now in the present.

 

[nemomen]

Oh nice, I've been looking to play something like this!

 

[CSmith327]

or use Bsnes for all your super gameboy needs (what i use)
just open the super gameboy rom with it then provide the compatible GB rom and you are good to go out of the gate

Ah you're right, I forgot about just using SNES emulators for SGB compatible roms. That's a good idea too

 

[gxm]

I recommend using Mesen or mGBA for desktop or RetroArch with cores that support SGB (mGBA, VBA-M, and Sameboy) or the mobile mGBA app for this game. Just make sure to set them up with the SGB bios and toggle on the features for it in the options of the emulator.

Here's the system bios file for Super Game Boy 2 like I promised in the description (make sure to leave it unzipped):

or use Bsnes for all your super gameboy needs (what i use)
just open the super gameboy rom with it then provide the compatible GB rom and you are good to go out of the gate

 

[CSmith327]

Is there a physical / special split?

I've not tried this yet, but since they didn't mention something as major of a gameplay change as the split on either the Github page or the PokéCommunity forum post then I doubt it has it. Which is a shame since that really adds a lot more depth to the gameplay. But then again maybe it does have it and they failed to mention it? I'll have to try this out tomorrow for myself.

Q: How many upgrade hacks does Pokémon need?
A: Yes

Well to be fair Pokémon Let's Go Eevee and Pikachu for Switch was kind of a shitty remake of Red/Blue/Yellow. I hated the way you had to manage leveling up Pokémon and how you caught them. Because there was no wild battles it made it a lot harder to level them up. The only worthwhile thing in that game was being able to play with and pet your Eevee. That was like the most adorable thing I think I've ever seen in a video game. Like no joke, that was cute af. Eevee's voice actress was super cute and endearing. So having upgraded tweaks to GB Red/Blue or GBA FireRed/LeafGreen is a decent alternative I guess. I personally liked the romhack Pokémon Red++ but I don't think it's on the Repo.

 

[RageBurner]

I really love enhancement hacks like these for Pokémon, nice catch, @CSmith327.

 

[CSmith327]

I recommend using Mesen or mGBA for desktop or RetroArch with cores that support SGB (mGBA, VBA-M, and Sameboy) or the mobile mGBA app for this game. Just make sure to set them up with the SGB bios and toggle on the features for it in the options of the emulator.

Here's the system bios file for Super Game Boy 2 like I promised in the description (make sure to leave it unzipped):

 

[DarioEMD]

Q: How many upgrade hacks does Pokémon need?
A: Yes

 

[AlmaElma123]

Uploading fire as always~

This is why you are one of the best uploaders here~

 

[CrestfallenAnon]

Is there a physical / special split?