This is my romhack of Pokémon Crystal. It's still in early alpha, so all the changes I want to make are not yet implemented.
Starting from v0.14 my romhack is available as a BPS patch. Download it from the Releases page, then use RomPatcher.js (or any other program that supports BPS patches) to apply it on top of your retail Pokemon - Crystal Version (UE) (V1.0) ROM.
Warning
The correct base ROM has this SHA1 hash: f4cd194bdee0d04ca4eac29e09b8e4e9d818c133
Clone this repository, or download one of the tarballs from the Releases page, and follow these instructions.
You can clone the upstream repository to build a retail ROM with the correct hash.