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SPECIFICTION
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Pokémon ROM Patcher

pokepatched.com

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Spec score 7.1 #14 of 20 in ROM Patching Software

What it is

Pokémon ROM Patcher applies a patch to a Pokémon game file and returns the modified game for download. It runs in a browser without installation, processing the ROM and patch locally with JavaScript; Pokepatched says those files are never uploaded or received. The input accepts .gba, .nds, and .gbc files. Supported patch formats include IPS, UPS, BPS, xdelta, APS, PPF, RUP, BDF, and PMSR, with format recognition after both files are loaded. The tool works in modern mobile browsers and can be used with files for Delta on iPhone or a GBA emulator on Android. The resulting file can open in GBA, NDS, or GBC emulators. A patch must match its specific base-ROM version; a mismatch may cause a checksum error, failed patch, or crash. The free patcher recommends a clean ROM for each hack and does not host base ROMs.

Spec sheet

Purpose
Pokémon ROM Patcher applies a patch to a Pokémon ROM and returns the patched game as a download.Read 7 Oct 2026 · pokepatched.com
Audience
The tool is for people applying Pokémon ROM hack patches to their own base game files.Read 7 Oct 2026 · pokepatched.com
Support
The contact page lists submissions, corrections and takedown requests as reasons to get in touch.Read 7 Oct 2026 · pokepatched.com
Maker
The About page describes Pokepatched as an independent, fan-run index of Pokémon ROM hacks.Read 7 Oct 2026 · pokepatched.com
Affiliation
Pokepatched says it is not affiliated with, endorsed by or sponsored by Nintendo, Game Freak, Creatures Inc. or The Pokémon Company International.Read 7 Oct 2026 · pokepatched.com
Automatic format recognition
The patcher recognises the patch format automatically after the user loads the ROM and patch.Read 7 Oct 2026 · pokepatched.com
Base ROM requirement
Patches target a specific ROM version, and using the wrong base ROM can cause patch failures or crashes.Read 7 Oct 2026 · pokepatched.com
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.Read 7 Oct 2026 · pokepatched.com
Dependencies
The patcher is powered by RomPatcher.js, which the page identifies as MIT licensed.Read 7 Oct 2026 · pokepatched.com
Emulator use
The downloaded patched game can be opened in a GBA, NDS or GBC emulator.Read 7 Oct 2026 · pokepatched.com
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.Read 7 Oct 2026 · pokepatched.com
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.Read 7 Oct 2026 · pokepatched.com
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.Read 7 Oct 2026 · pokepatched.com
No installation
The patcher runs in a browser without installing anything.Read 7 Oct 2026 · pokepatched.com
Patch formats
The patcher accepts IPS, UPS, BPS, xdelta, APS, PPF, RUP, BDF and PMSR formats.Read 7 Oct 2026 · pokepatched.com
ROM file types
The input slot accepts .gba, .nds and .gbc files.Read 7 Oct 2026 · pokepatched.com
ROM sourcing
Pokepatched says it does not host or link to base ROMs, and users supply a game they legally own.Read 7 Oct 2026 · pokepatched.com
Supported ROM file examples
The base ROM drop slot lists .gba, .nds and .gbc files.Read 7 Oct 2026 · pokepatched.com
Underlying software
The patcher is powered by RomPatcher.js, which the page identifies as MIT-licensed.Read 7 Oct 2026 · pokepatched.com
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.Read 7 Oct 2026 · pokepatched.com

Strong points and limits

Strong points

  • Free browser-based patching
  • No installation required
  • Files are processed locally
  • Recognizes many patch formats automatically
  • Works in modern mobile browsers

Limits

  • Wrong ROM versions can cause crashes
  • Clean ROM recommended for each hack
  • Pokepatched does not provide base ROMs
  • Second patches require a compatible prior patch

Who it suits

It suits people applying Pokémon ROM-hack patches to game files they legally own. Users should know the exact ROM release required by each patch.

Verdict

Pokémon ROM Patcher offers local, no-installation patching across common ROM and patch formats. Success depends on matching the patch to the correct base release and avoiding incompatible patch stacking.

Where Specifiction places it

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