Pokemon Emerald Ported to WebAssembly (100k FPS)

Original Article ↗ Hacker News Discussion ↗

A fan-made port of Pokémon Emerald compiled directly to WebAssembly is impressing people with extremely high frame rates and in-browser save support, while also drawing attention to missing features like audio, key remapping, and numerous crash bugs. Commenters explore how the project builds on community decompilations rather than a GBA emulator, raising thorny questions about copyright, asset distribution, and the likelihood of DMCA takedowns. Several posts also highlight how large language models are increasingly used to accelerate emulator and porting work, and suggest improvements such as PWA support, offline play, and more intuitive controls.

Project nature & performance

  • Port runs Pokémon Emerald itself compiled to WebAssembly, not a generic GBA emulator; derived from a community decompilation/recompilation project.
  • Linked GitHub repos show the WASM port and original decompiled/expanded codebase.
  • Users report very high framerates (into thousands of FPS) on various devices using the speed slider, though some initially see low FPS until adjusting it.

Legal / IP and hosting concerns

  • Multiple comments question how long this can stay up before a DMCA, especially since the web version appears to ship the full assets and does not require a ROM.
  • Contrast is made with the original decomp projects, which require users to supply their own ROM and aim not to distribute assets directly.
  • Detailed discussion of how some projects embed assets in proprietary formats to make DMCA enforcement harder, but this is characterized as a shortcut and legally murky.
  • Suggestions to host such work on self‑hosted or decentralized platforms in friendlier jurisdictions.
  • Broader criticism of long copyright terms and their effect on cultural works.

PWA / deployment

  • Some attempt to run it as a PWA on mobile; it currently lacks a proper web app manifest and offline support, though commenters note this would be straightforward to add.
  • Need for an app icon is mentioned as a blocker for a “proper” PWA.

Controls, UX, and requested features

  • Default keyboard controls use classic emulator mappings (Z/X, arrows); several ask for on‑screen hints and configurable keybinds (WASD, alternative Start key).
  • Requests for more intuitive touch controls on mobile.
  • Popular request for a normal vs sped‑up mode and a dedicated “fast‑forward” key.
  • Export/import of save files is requested to guard against browser data clearing.

Audio, bugs, and stability

  • Current version lacks audio; multiple forks are working on adding sound with varying accuracy.
  • Users confirm saving works but report numerous crashes: opening the Pokémon menu, using items, first battle evolutions, and specific battle animations.
  • Text/logic bugs are noted (items shown as numbers, incorrect stat messages).
  • Some find the D‑pad behavior and name entry navigation glitchy; a few cannot get past the start screen.
  • One commenter calls the current build “horribly bugged” and suggests using a more mature emulator/ROM setup instead.