# pret/pokecrystal

Disassembly of Pokémon Crystal

Repository: https://github.com/pret/pokecrystal
Canonical: https://ross.abutalabs.com/products/pokecrystal
Homepage: https://pret.github.io/pokecrystal/
Language: Assembly
License Family: other
Topics: pokemon, disassembly, gameboy-color, reverse-engineering, gbz80
Last push: 2026-08-13T21:57:49+00:00

## Health v2 (maintenance only)
Score: 76/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 97, release rhythm 35, longevity 100
- inputs: {"age_days": 5251, "days_push": 20, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2494, forks 969 (observed 2026-08-28T04:06:56.615519+00:00)

## What it is
A complete, buildable disassembly of Pokémon Crystal written in Game Boy assembly (gbz80). It reconstructs the original ROM byte-for-byte and serves as documentation and a base for ROM hacking.

## Use cases
- rebuild the Pokémon Crystal ROM from source
- study how a Game Boy Color game is implemented
- make custom ROM hacks of Pokémon Crystal
- look up assembly symbols and game internals
- learn gbz80 assembly through a real game

## When to choose
- you want a fully verified, byte-exact disassembly of Pokémon Crystal
- you want to hack or modify Pokémon Crystal with readable source
- you want to learn Game Boy assembly on a well-documented codebase

## When to avoid
- you want a playable game without building it yourself
- you need disassemblies of other Pokémon titles or platforms
- you want a high-level game engine rather than literal original code

## Facets
- artifact type: learning-resource
- maturity: active
- function: reverse-engineering, compiler, developer-tools
- domain: reverse-engineering, gaming-tools
- platform: cli, cross-platform
- tags: disassembly, pokemon, gameboy-color, gbz80, assembly, rom-hacking, game-development

## Member repositories
- pret/pokecrystal (main) score 76

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:56.615519+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:27:17.564526+00:00, confidence not recorded.
  - readme: https://github.com/pret/pokecrystal (fetched 2026-08-28T04:06:56.615519+00:00, sha 94ef6e9d391b)
  - homepage: https://pret.github.io/pokecrystal/ (fetched 2026-08-29T10:09:26.484240+00:00, sha e93461126d18)
- Data as of 2026-08-30T08:39:29.467469+00:00.