:et's Play Pokemon Pure Red Part 4 - The Elite Four vs My Hubris
https://www.pokecommunity.com/threads/pokemon-purergb-qol-romhack-complete-possible-future-updates-too.494837/
This is a purist's enhancement of Pokemon Red/Green/Blue based on the pokered disassembly. The goal is to enhance the original games for excellent replayability without bringing in mechanics, moves, sprites, visuals, type matchups, or pokemon that were introduced in later games.
Many bugfixes/quality of life enhancements were made.
A large amount of in-game options for gameplay and visuals / audio are provided.
Beta content was added where I felt it made sense, and some new postgame areas (some hard to find) were added.
Many pokemon/moves were rebalanced with the intention of making every pokemon useful or at least fairly usable. When I say rebalanced, I mean improve the bad pokemon, not nerf good ones. The good ones are still good.
Convenience features were added like an entire new pokedex mode for checking the effects of moves you've seen called the MOVEDEX.
- Quoted from Vortiene