Pokémon Prism
Base ROM Pokémon Crystal
Region Naljo
Starters Larvitar (player), Bagon (rival)
Official Website (New development team)

Pokémon Prism is a Rom Hack of Pokémon Crystal, created by Koolboyman.

The storyline elapses in the region of Naljo. The game is a sequel of Pokémon Brown, thus, the player can travel to Rijon for a second quest. The Pokédex has 252 Pokemon, including some from each of the first four generations as well as new Elemental Types and TM's. The game includes new mini-games and plot points in which the player controls a Pokémon. The development team of Twitch Plays Pokémon also contributed to the game's development with lead developer Koolboyman as project manager.

On December 21, 2016, Nintendo sent a cease & desist order which ended the game's development. However, an anonymous user on 4chan leaked v0.91 (build 0144) of the game. The leaked build is from December 19, 2016.

The current leaked build is fully functional, but is missing certain things from what would have been the finalized version of the game, such as outdated sprites, missing trigger events for trainers, and a post-game mission from Lance that was supposed to have been released in an official future build of the game. Version 0.94 is released, which fixes most of the bugs in the leaked version. Versions 0.92, 0.93, and 0.94 were developed by RainbowDevs who are the new development team for Pokémon Prism.

Storyline Edit

This is the story of Prism, the son/daughter of Lance. After playing in their uncle’s mine cart in an unidentified region, it somehow spins out of control and ends up in the region of Naljo. Naljo is a developing region bent on the dream of purist industrialization. After finding a lost Larvitar, Prism must collect the 20 Naljo badges while fixing all that is wrong with this corrupted region.


  • Explore the brand new region of Naljo (bigger than G/S/C's Johto), featuring 10 original cities, towns, and villages, as well as a large number of caves, forests, routes, and secrets.
  • Return of the region of Rijon from Pokemon brown.
  • Find 252 Pokémon spanning from generations 1 - 4.
  • New Clock system - No longer real time, but can keep track of days months and years.
  • Pokémon only areas - play as your team mates to unlock secrets and progress through areas inaccessible to humans.
  • New abilities.
  • Two new types (Gas and Sound).
  • Several new moves.
  • Several new items.
  • New TM/HM sets.
  • ASM Work.
  • New Pokédex order (Naljo), as well as the National Dex.
  • Interact with brand new characters, as well as some returning characters from both the official games and Pokémon Brown.
  • Hidden Gold Token system - save them up and get something good. Can you find all 80 of them?
  • Trainer Abilities - mine, smelt, and craft until you really are the very best! Jump chasms and climb walls - what else may await you underground?
  • Side Scrolling areas
  • Newns
  • Due to the fact of this being a pokemon crystal hack, generation 3-4 pokemon have animations
    • Keep in mind that since Sylveon didn't originally came from a sprite based game, it's sprites was drawn from stratch, in this case it behaves like a high class lady doing the "hohohoho" pose

New EvolutionsEdit

The following evolutions of Pokémon from later generations are found in this game:


  • Generation 4 - Glaceon, Leafeon
  • Generation 6 - Sylveon

Generation 1 Pokémon EvolutionEdit

  • Magmar - Magmotar
  • Electabuzz - Electivire
  • Rhydon - Rhyperior
  • Magneton - Magnezone
  • Tangela - Tangrowth

Generation 2 Pokémon EvolutionsEdit

  • Murkrow- Honchkrow
  • Sneasel - Weavile
  • Yanma - Yanmega
  • Misdreavus - Mismagius
  • Piloswine - Mamoswine
  • Gligar - Gliscor
  • Togetic - Togekiss