Pokemon Cosmic Emerald Version

Pokemon Cosmic Emerald Version

Download Pokemon Cosmic Emerald Version GBA Rom Hack (Pre-Patched)

Pokemon Cosmic Emerald Version is a GBA Rom Hack made by SkyVortex which is based on Pokemon Emerald. It is now available to download in English and was last updated December 24, 2019.

  • Creator: SkyVortex
  • Version: December 24, 2019 update
  • Hack of: Emerald
  • Updated: December 24, 2019

Pokemon Cosmic Emerald Version is mostly a “quality of life improvement” ROM hack that does not modify the main plot. It retains all of the elements of the original Emerald, but adds some new ones to make it more gratifying and enjoyable to play. Remember when there were stories about going to the Moon after a particular number of rocket launches/weeks? Several such things will be considered, but with some modifications/twists in how they are carried out. There is a moderate boost in difficulty (not particularly significant; it is simply geared primarily at veteran players), but there are prizes to compensate.

Only a few newer-generation elements have been included, since I wanted to maintain the gameplay as true to the pre-2007 scenario as feasible while also incorporating a few functional enhancements from newer games. However, I may incorporate a few newer-generation Pokémon as special appearances/events in the distant future. Expanding the PokéDex appears to force the game to require its own exclusive saves only, but I believe it will be fine as long as the hack’s saves are not combined with the usual Emerald files (or vice versa, I guess). Remember that if I ever release an expanded-Dex version, it may not be compatible with a save file from the ordinary version of this hack. In any case, I will not stop updating the regular one and will continue to release it if that is the case. I’d also look for a way to make the old saves compatible with the new one.

Description (from author)

I first released this at PHO, then brought it to PokéCommunity (due to several requests), and now it has arrived at Silph Co. – which will now be its home base. I hope you enjoy it!

Okay, so this hack has been in the works for a long time, having been worked on in small phases at a time since I first learned about ROM hacking several years ago. I’m not sure when it was (maybe 2010?).

It had been put on hold several times due to life-stuff, and I had even redone it from the beginning a couple of times to find and remove any and all glitches/errors; I spent most of the time figuring out what the most minimalistic/efficient ways to implement everything were. It’s finally here, and as of the most recent update, nearly all of the features I had planned are included!

To be able to quickly and easily pinpoint the cause of any errors, a change-log (different from the one here) has been kept documenting every single change that has been made (as well as dates-of-editing, revisions, and future ideas). To avoid glitches, programme choices and how they were used were carefully considered. I’m also attempting to preserve the base ROM’s save-data structure so that the regular Emerald’s game saves remain ‘backwards/forwards’ compatible (originally for testing scripts, graphics, etc.). This may change in the future, but only on a separate branch of this project.


  • PRNG glitch has been fixed
  • All 386 Gen 1-3 Pokémon available
  • New Evo Stone that evolves Trade-Evo Pokémon
  • More Roaming Legendaries
  • Events based on Day/Night and game completion status
  • Events/Legendaries have signature themes
  • Mirage Island relevant for PokéDex completion
  • Day & Night System
  • Upgraded B/W Repel System
  • TMs are re-useable
  • Pokéballs are re-useable until capture
  • Pokémon receive EXP on captures
  • EVs cap at 252
  • Steeper difficulty curve
  • Running when indoors

Useful Stuff

Check out Pokemon Cloud White 3!




SkyVortex, Banjora Marxvile, Beastly12817, BluRose, DizzyEgg, FamiliaWerneck, Gamer2020, HackMew, Jambo51, Jirachiwishmaker, Kleenexfeu, Kyledove, LU-HO, Mastermind-X, Prime-dialga, SabfromPC, The_Learner, ThomasWinwood, Wichu 

You can download the Pokemon Pokemon Cosmic Emerald Version GBA ROM from this page and you can download an Emulator for your device from this link to play the game.