Pokemon Crystal Ultimate ROM

Pokemon Crystal Ultimate rom
When focusing on the main objectives, Pokemon Crystal Ultimate is about 20 Hours in length. If you're a gamer that strives to see all aspects of the game, you are likely to spend around 35 Hours to obtain 100% completion.

Pokemon Crystal Ultimate is a GBC ROM Hack by Major Agnostic based on Pokemon Crystal. The goal of Pokemon Crystal Ultimate is to be the ultimate Pokemon Crystal experience for fans: same story, same Pokemon, and same locations, but the game is more playable, balanced, and challenging. Just about everything is viable now due to a thorough revision of moves, learnsets, base stats, and Pokemon availability.

You can download the Pokemon Crystal Ultimate rom from this page and to play the game you need to download the Visualboy Advance Emulator here.

You need to download and install Visual Boy Advance and then load the rom.

For detailed instructions per device, view below.

Download the official Pokemon Crystal Ultimate ROM in the (USA) version for the Game Boy Advance handheld consoles. To fully utilize a GBC ROM game, use our Cheats, Rom Hacks and GBA Roms sections. You can open the Pokemon Crystal Ultimate ROM or GBC file by Installing VisualBoyAdvance on Windows, MAC, Linux, Android or IOS/iphone.

Additional Information

Pokemon Crystal Ultimate is a GBC ROM Hack by Major Agnostic based on Pokemon Crystal. It was last updated on March 09, 2024.

Also, be sure to check out Pokemon Crystal Prodigy.


The goal of Pokemon Crystal Ultimate is to be the ultimate Pokemon Crystal experience for fans: same story, same Pokemon, and same locations, but the game is more playable, balanced, and challenging. Just about everything is viable now due to a thorough revision of moves, learnsets, base stats, and Pokemon availability. The game’s challenge has been increased by revamping the level curve and adding to trainer parties custom moves, DVs, and stat experience, as well as providing a greater variety and number of Pokemon to their teams.


  • Map changes that bring previously unimpressive areas to life (e.g. Victory Road in the first screenshot) and add convenience, such as the Goldenrod shortcuts
  • Reworked in-battle and overworld sprites for notable characters and Surfing, as well as for Pokemon in the party menu and overworld
  • Added evening as a time of day with a golden hue
  • Convenient features such as being prompted to reuse Repels, resuable TMs, new gen 1 (GENWUNNERS) move tutors, a move reminder, and a Pocket PC
  • More item variety and accessibility, such as a Lucky Egg early on, rare items found as milestone gifts in your room, all decorations can be obtained outside of Mystery Gift, and fossil Pokemon are found in the Ruins of Alph
  • Brand new Kanto storyline based on existing lore to liven up the region; the first part of this new story is playable in v.1.0.7 (see my Discord linked below)
  • Over 90 new trainers added to the game
  • New music and softer night versions for all outdoor themes
  • Hold B to run
  • Cross-region Fly
  • All 251 Pokemon and all items obtainable through normal play
  • Base stat, move and Pokemon type changes to rebalance the battle system (see the documentation linked below for details on a Classic version that limits some of these changes)
  • New special trainer battles and superbosses
  • New side quests
  • Restored Kanto maps and revised/revamped many others
  • A level and stat exp curve that match a diligent player’s progression
  • Level caps for extra challenge (added in v1.0.2)
  • Trainer card badges are in colour and a third page has been added for Kanto
  • Sprites have a softer and darker hue at night to match the darkness
  • 1/256 shiny encounter rate (1/3 for the Odd Egg) and shinies always have high DVs
  • Fixed many bugs (such as Kirt’s balls) and restored things like the Celebi event
  • Significant AI improvements
  • Improved rematch system: rematch trainers offer their number automatically after you first defeat them and have much better scaling
  • Every ball has a unique colour palette and catching Pokemon yields exp
  • In-battle weather indicator
  • Elite Four rematch with new dialogue




  • Fixed bug where those who start with Cyndaquil can’t fight the new Bug Catcher Adam in Ilex Forest
  • Fixed odd egg bug where they can de-level from level 10 and have incorrect stats
  • Removed glitchy shiny toggle feature
  • Fixed VR boulder glitch (finally) and Karate King sprite glitch (I think lol)
  • Fixed buggy Route 12 Fisher
  • Fixed buggy menu when buying coins (you can now see your coin total)
  • Fixed bug where Tom can walk on pillars on Route 8
  • Fixed bug where Cloyster Hoister man doesn’t teleport after paying him (fixed Fuchsia and Route 14 new berry tree constants)
  • Fixed the bug with Sage Masa’s team
  • Fixed mistake with Dojo quest and added a tip sign to the dojo


  • AI improvements (e.g. AI now properly evaluates the power of move effects like multi/triple-hit, Thief will now be used so watch out)
  • Better wild encounter availability, many revisions to trainer parties
  • Daycare man now stands outside the pen/fence when he has an egg for you (excluding odd egg)
  • Removed grass from in front of daycare, making it easier to go up and down through Goldenrod to hatch eggs
  • Restored Battle Tower; BT now features only 2 level tiers: 50 and 100 (available only after Hall of Fame). Ubers can
  • be used for tier 100 and opponents at that level will also have access to them. New BT battle music and BT Pokemon have been revised and rebalanced
  • Can Fly from all outdoor areas (including Goldenrod Dept Store Roof and Celadon Mansion Roof) and can now Fly to Battle Tower
  • New music for Trainer House battles (same as BT), E4 Level cap is 70 instead of 75
  • Friendship changes: Friend Ball sets starting happiness at 150 instead of 200; friendship evolution occurs at friendship 200+
  • Many learnset improvements (see in documentation), a few base stat (Hitmons notably) and move changes (e.g. Fly buffed to 80 pow, Triple Kick buffed to 28-168 pow)
  • Pre-Bugsy grind was reduced by adding Ledian to Ilex encounters (morn/day) and increasing base exp yields for Pokemon encountered in Ilex;
  • Slowpoke Well now has Geodude and more Slowpoke encounters, and wild levels have been increased for this part of the game
  • Also, increased base exp yields for many buffed Pokemon, particularly those that don’t evolve (e.g. Gligar gives more exp because its stats are now closer to Gliscor’s)
  • PokeCenter healing dialogue is much shorter, Lure Ball is now x4 catch rate, Houndour now evolves at level 42
  • Surfing Pikachu is now always red, regardless of player gender; “ATK” in the Move menu (from the party menu) is now “POW” for power
  • Mystery Gift is now obtained automatically after defeating the E4 (to later unlock a new title screen)


  • New HP and EXP bars by Idain + red caught poke ball and gender symbols with help from KDL Pro
  • New overworld and in-battle ball sprites and capture animation (in-battle sprites from Polished and modified by Idain, animation, and other HUD improvements by me)
  • Improvements to some icons and sprites, notably Rocket sprites and trainer card graphics
  • Overworld grass color is now a nicer green rather than lime


  • New endgame Youngster Joey rematch and Miracle Seed can no longer be missed
  • Added temporary battle (will not exist in the same format in future updates) against an old foe, hinting at the future of the hack
  • Added a new side quest to Route 16 that unlocks cross-region Fly
    Added a new main story quest to Fuchsia


  • Two new maps for the new Fuchsia quest (Safari Zone Office repurposed);
  • Fuchsia got many other changes, including Pokemon in the pens like three years ago – Roof palettes have been changed to better reflect each city’s color/theme
  • Viridian, Vermilion, Celadon, Saffron, Lavender, and Blackthorn maps have new buildings (empty pending future updates)
  • Olivine move reminder house swapped with Fishing Guru’s


  • TM Endure replaced with Sludge Bomb and the latter with Giga Drain (Erika now gives nothing)
  • TMs Endure, Sweet Scent and Defense Curl are now obtainable at the Goldenrod Game Corner
  • The Sweet Scent girl now gives the Lucky Egg instead, as Sweet Scent is purchased at the Goldenrod Game Corner
  • Thunder, Blizzard and Fire Blast are only obtained in Kanto (see doc for details)
  • TM Rollout is now obtained on Route 46 (post-Rock Smash) and TM Sleep Talk was moved to Route 4
  • TM Psych Up now has the Calm Mind effect and is obtained by defeating Sabrina
  • Replaced TM Roar with TM Teleport (no longer need Cut to reach it); can be learned by all gen 1 Pokemon that originally could, all gen 2 psychic-types (other than Unown) including Wobbuffet, and Ninetales, Persian, three beasts, Stantler, Cleffa, Igglybuff, Venonat, Hoothoot, Noctowl, Togetic, Delibird, Porygon2, Blissey, and Ho-Oh

File Name

Pokemon Crystal Ultimate

File Size



Release Date

World: March 09, 2024




Major Agnostic


Game Boy Color




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