Pokemon Sour Crystal ROM

Pokemon Sour Crystal is a GBC ROM Hack by Sourapple based on Pokemon Crystal. It was last updated on April 20, 2026.

Description

Pokemon Sour Crystal is a hack that is full of ‘Quality of Life’ features to give the player an overall better experience. This hack’s goal is to try and improve upon most of the original game’s known flaws while retaining the overall Gen2 feeling as best as it can.

Features

• New Custom Pokémon Sprites done by me. Over 200 have been tweaked/redone
• A Challenge Mode System which can be set during a New Game
• A fully-functioning Safari Zone with 4 custom Biomes to explore
• Unique Party sprites
• Updated Stats up to gen9
• Updated Move properties: Base Power, Accuracy, effects .etc
• Updated Movepools
• Upgraded trainer rematch system to make grinding more enjoyable and rewarding
• A complete overhaul of the PC Box which now functions like Gen3. No more saving between boxes required
• Some post-game Pokémon are now available in Johto such as Houndour and Slugma
• Upgraded battle color system for more dynamic attack animations
• Updated attack animations for some moves
• All 251 Pokémon obtainable
• Instant Apricorn Balls
• Visible Berries and Apricorns on the overworld. Each tree respawns at 12:00am each day
• A Berry Pocket to reduce your main pocket from getting full
• A new Pager system that replaces the need for HM slaves
• Reusable TMs
• The Ghost-Type is now special and the Dark-Type and Dragon-Type are now Physical
• A new Swarm system with more than 95 different swarms. Swarming Pokémon now have an increased chance of being shiny
• Almost all bugs from gen2 have been fixed.
• Kanto has been restored to its gen1 size including some cut areas
• Kanto now has Headbutt trees
• All HGSS-exclusive routes and trainers have been ported
• Trade Evolutions can now also be obtained by using a new item called the Linking Cord or by simply using the item required for trading on the Pokémon. (King’s Rock, Metal Coat, etc.)
• A Move Reminder
• And many other small goodies to find!

This Hack DOES NOT include:

• Following Pokémon
• Physical/Special Split
• No gen3+ Pokémon
• No fakemon or beta mons

Changelog

V6.2

Updates

• The game now ‘Tags’ your save file for future updates. This will allow save files to be updated in-game with the next update.
• The ITEMFINDER has been reworked to function like in FRLG. Arrows will appear showing you the direction of nearby hidden items.
• The Pokegear now displays the day + time for trainers that can be re-fought.
• The Fossils are slightly easier to notice when moving through the Mt.Mortar.
• The fossils in Pewter City Museum are now colored.
• Updated the sprites for the following pokemon:
  • Drowzee (back)
  • Kingler (back)
  • Vaporeon (front + palette)
  • Kabutops (back)
  • Dratini (front + palette)
  • Dragonair (front + back + palette)
  • Sunflora (front + palette)
  • Mareep (palette)
• Updated the animations for the following attacks:
  • Wrap
  • Bind
  • Constrict
  • Rock Throw
  • Rock Slide
  • Magnitude
  • Flamethrower
  • Fire Blast

Bugfixes

• HOTFIX: Save files from earlier versions will now be correctly updated.
• HOTFIX: Pokeballs now disappear correctly when a wild mon breaks free.
• Depositing a Pokemon in the Daycare will no longer corrupt your party on rare occasions.
• Battling Sudowoodo after the E4 wont trigger Floria’s script again.
• MetalPowder now works correctly on Ditto.
• Corrected spelling errors and grammar across the game.

V6.1

Updates

• The Gen5 exp scaling has been removed.
• Fuchsia City has had its Safari Zone fully restored. Go catch some classic mons in the OG safari.
• Fuchsia City has been updated to reflect the restored Safari Zone. This includes the Pokemon Zoo and the pens.
• Fuchsia City Safari Zone office is no longer an empty building.
• Pictures of Pokemon displayed in the overworld such as previewing your starter choice, are now fully colored.
• Added new animations for being fully paralyzed and frozen solid. These animations will play each turn where applicable.
• Made slight adjustment to Golem’s Shiny colors.
• Krabby, Kingler and Pinsir now learn Guillotine much earlier.
• Ledian can now learn Psychic via TM
• Re-adjusted the levels of when Pidgey’s line learns moves
• Updated RazorWind’s charging animation
• Venomoth has a new sprite and animation
• Gengar has a new animation
• Re-adjusted the rematch teams for Brock and Bruno
• Venomoth can now learn Dream Eater via TM

Bugfixes

• Crunch’s move description now correctly states it can lower DEFENSE.
• Fixed an issue where a graphical glitch could occur in rare cases when ending a Safari Zone game.
• Corrected some in-game text to refer to the new slot machine reels.

V6.0b

Updates

• Slight adjustment to Bayleef and Wooper’s backsprites

Bugfixes

• Fixed a bug where experience yields were not being calculated correctly

Useful Links

Discord

Romhacking

Reddit

Github

Pokecommunity