Pokémon ROM Patcher
Pokémon ROM Patcher applies a patch to a Pokémon ROM and provides the patched game as a download.
What Pokémon ROM Patcher is
Pokémon ROM Patcher applies a patch to a Pokémon ROM and provides the patched game as a download. It runs in a browser without installation, processing the files locally in JavaScript; Pokepatched says it never receives or uploads them. The base ROM input accepts .gba, .nds, and .gbc files, while supported patch formats are IPS, UPS, BPS, xdelta, APS, PPF, RUP, BDF, and PMSR. The patch format is recognized automatically after files are loaded. The tool works in modern mobile browsers, including for files used with Delta on iPhone or a GBA emulator on Android. The downloaded result can be opened in a GBA, NDS, or GBC emulator. A patch must match the particular ROM version it targets: a mismatch can lead to a checksum error, a failed patch, or a crash, and some hacks call for a specific release such as US version 1.0. The site recommends beginning with a clean ROM for each hack. A second patch works only if made for the already patched file. The patcher is free and powered by MIT-licensed RomPatcher.js. Pokepatched says users supply games they legally own and that it does not host or link to base ROMs.
Good
- Runs in a browser without installation.
- Patch files are processed locally.
- Recognizes supported patch formats automatically.
- Works in modern mobile browsers.
- Free to use.
Watch out
- A mismatched base ROM can cause failure or crashes.
- Stacking patches works only for compatible patches.
- Users must provide their own base ROM.
Who it suits
This browser tool suits people applying Pokémon ROM hack patches to their own base game files. Users need a matching ROM version and a compatible emulator for the downloaded game.
Verdict
Pokémon ROM Patcher offers local, browser-based patching across several ROM and patch formats. Matching the exact base ROM version and starting clean for each hack are important considerations.
The facts
Each one read from Pokémon ROM Patcher's own pages, with the date it was checked.
What it does
- Affiliation
- Pokepatched says it is not affiliated with, endorsed by or sponsored by Nintendo, Game Freak, Creatures Inc. or The Pokémon Company International.checked 7 Oct 2026
- Audience
- The tool is for people applying Pokémon ROM hack patches to their own base game files.checked 7 Oct 2026
- Automatic format recognition
- The patcher recognises the patch format automatically after the user loads the ROM and patch.checked 7 Oct 2026
- Base ROM requirement
- Patches target a specific ROM version, and using the wrong base ROM can cause patch failures or crashes.checked 7 Oct 2026
- Clean ROM recommended
- The site recommends starting with a clean ROM because stacking patches usually breaks both hacks unless the second patch was built for the first.checked 7 Oct 2026
- Dependencies
- The patcher is powered by RomPatcher.js, which the page identifies as MIT licensed.checked 7 Oct 2026
- Emulator use
- The downloaded patched game can be opened in a GBA, NDS or GBC emulator.checked 7 Oct 2026
- Existing hacks
- Applying a second patch is supported only when that patch was built for the already patched file; the page recommends starting from a clean ROM for each hack.checked 7 Oct 2026
- Local processing
- The patch is applied by JavaScript on the user's device, and the page says files are never uploaded or received by Pokepatched.checked 7 Oct 2026
- Mobile support
- The patcher says it works in any modern mobile browser, including for files used with Delta on iPhone or a GBA emulator on Android.checked 7 Oct 2026
- No installation
- The patcher runs in a browser without installing anything.checked 7 Oct 2026
- Patch formats
- The patcher accepts IPS, UPS, BPS, xdelta, APS, PPF, RUP, BDF and PMSR formats.checked 7 Oct 2026
- Purpose
- Pokémon ROM Patcher applies a patch to a Pokémon ROM and returns the patched game as a download.checked 7 Oct 2026
- ROM file types
- The input slot accepts .gba, .nds and .gbc files.checked 7 Oct 2026
- ROM sourcing
- Pokepatched says it does not host or link to base ROMs, and users supply a game they legally own.checked 7 Oct 2026
- Support
- The contact page lists submissions, corrections and takedown requests as reasons to get in touch.checked 7 Oct 2026
- Supported ROM file examples
- The base ROM drop slot lists .gba, .nds and .gbc files.checked 7 Oct 2026
- Underlying software
- The patcher is powered by RomPatcher.js, which the page identifies as MIT-licensed.checked 7 Oct 2026
- Wrong base ROM
- The page warns that using the wrong base ROM can cause a crash or checksum error and says hacks may require a specific release, such as US version 1.0.checked 7 Oct 2026
The company
- Maker
- The About page describes Pokepatched as an independent, fan-run index of Pokémon ROM hacks.checked 7 Oct 2026
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