Pokémon PureRGB (PureRed, PureGreen, PureBlue)

What it is

Vortyne's PureRGB comes in three editions (PureRed, PureGreen and PureBlue) built on the pokered disassembly. The idea is to make the first-generation games more replayable while staying true to them: no moves, types, sprites or Pokémon from later games.

What changes

• all 151 Pokémon can be caught in every edition, and many are easier to get early, with better movesets and more balanced stats
• weak moves are made more useful, and some Pokémon gain a second type (which an NPC can switch back)
• the best front sprites from the Japanese and Spaceworld '97 versions, plus optional back sprites, palettes from Super Game Boy or Yellow, colored attacks, enhanced music and stereo sound
• HMs can be forgotten at any time, a Movedex and a Town Map that shows wild Pokémon, and a Poké Ball designer in Cerulean City
• a new Cinnabar Volcano area built from unused map data, training clubs, a rematch arena and secret post-game areas
• many small quality-of-life tweaks and bug fixes; battle quirks players can exploit are kept, and Missingno no longer corrupts your save

Version 2.7.7 speeds up sprite loading on Game Boy Color and fixes several dialogue and Safari Zone bugs.

Playing it

Patch your own copy of Red, Green or Blue with the matching edition, following the repository's instructions. It runs on Game Boy, Game Boy Color and Super Game Boy.