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Jev walks a real Pokémon FireRed ROM.
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CommunityJev Demos & Experiments
JevEmon
A demo that walks a real Pokémon FireRed ROM: the code reads the overworld out of RAM, works out every reachable destination, and Jev picks where to go — and how to fight wild encounters — through typed decisions, not screenshots.
- Stars
- 4
- Language
- HTML
- License
- GPL-3.0
- Reading time
- 3 min
- Published by
- Community
- Author
- daniel4x
- Last verified
- Oct 2026
Used inJev for Gaming
Highlights
- Not a screenshot agent: each leg reads the overworld out of RAM and hands Jev every reachable destination — door, route, Pokémon Center — with visit counts.
- Wild encounters switch to a battle snapshot: HP, types, moves, stats, abilities, PP, and only the legal moves and switches for that turn.
- Jev answers one choice plus a probability for every option; an illegal answer stops the run — the README says there is no backup brain.
- Verified so far: leaving the Player's House, crossing Pallet Town, beating Route 1's wild encounters, and reaching Viridian City, where the run ends.
- Bring your own ROM, a TypeSafe API key in .env, and a Mac with Apple Silicon; brew install mgba ffmpeg uv sets up the rest.
Quickstart
bash
brew install mgba ffmpeg uv
uv run python scripts/setup.py
uv run python -m jevemon --prepare
uv run python -m jevemonWatch out
Copy reviewed against the repo README on 2026-10-15. The milestone list is the author's own status note — further legs such as Oak's Parcel and the first Gym are explicitly not built, and the ROM is not shipped. The project is Copyright 2026 Daniel Alfasi under GPL-3.0.
Questions about this entry
Short answers drawn from the linked project or page.
A demo where Jev walks a real Pokémon FireRed ROM. Each leg of the walk, the code reads the overworld out of RAM, works out every place you could actually go — a door, the path to the next route, a Pokémon Center if your party needs one — and hands that list to Jev. Jev picks a destination, and the code paths there and presses the buttons.
No. Jev receives a JSON snapshot of the overworld: where you are, your party's HP, and every destination the pathfinder confirmed is reachable, each with how many times you have already visited it. During encounters the snapshot switches to battle state. The README states plainly: not the screen.
A Pokémon FireRed ROM — the repo does not ship one — placed next to the README, a TypeSafe API key in .env copied from .env.example, a Mac with Apple Silicon, and the Homebrew packages mgba, ffmpeg and uv. The quick start then runs the setup, prepares the checkpoint and starts the local server.
Verified milestones are leaving the Player's House, crossing Pallet Town, delivering itself through Route 1 including winning wild encounters, and reaching Viridian City. Further legs such as Oak's Parcel and the first Gym are not built yet — the walk currently ends the run once it reaches Viridian City.
The snapshot switches to the same battle state as any other fight: HP, types, moves, stats, abilities, PP, and only the legal moves and switches for that turn. Jev fights it out with the same kind of typed decision, then the journey re-plans from wherever the encounter left you.
Yes. The README's one-walk command is uv run python -m jevemon --run --speed 4. Other commands include uv sync for just the Python environment, uv run python -m jevemon --check-journey for an offline check with no API calls, and --port 9000 to serve on a different port.
JevEmon is Copyright 2026 Daniel Alfasi, licensed under GPL-3.0; third-party dependencies and their licenses are listed in NOTICE.md. The README invites you to fork it and push the journey further, teaching it a destination beyond Viridian City or a whole different region.
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