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BPS Super Mario Bros. 2 Patcher

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What BPS Super Mario Bros. 2 Patcher is

BPS Super Mario Bros. 2 Patcher is a free browser tool for applying a BPS patch to a Super Mario Bros. 2 ROM. Its page has separate upload controls for the ROM and patch, plus an Apply patch button. The patcher checks both files and reports when an upload is not accepted. It supports the NTSC ROM version; an invalid ROM may be a bad dump or from another region. During validation, it checks and swaps iNES 1.0 and iNES 2.0 headers as needed. It also matches the ROM revision to the patch, recognizing ROM and patch checksums for revisions 0 and A and applying a revision conversion patch when appropriate. Once the patch is applied, the script saves a .nes file named using the patch filename. The project page links to source code on GitHub, which includes BPS handling code, ROM file and hash code, two revision patch files, and the page script and styles. The page credits Marc Robledo for Rom patcher JS; his maker profile describes him as a computer engineer. The tool runs on the web and does not offer batch patching or command-line support.

Who it suits

This suits someone who needs to apply a BPS patch to an NTSC Super Mario Bros. 2 ROM in a browser. It can also fit users who want file validation and automatic header and revision adjustments as part of patching.

What it does well

  • Free to use through a web page.
  • Separate upload controls for the ROM and BPS patch.
  • Validates uploaded ROM and patch files.
  • Adapts iNES headers and ROM revision to the patch.
  • Saves the patched result as a .nes file.
  • Links to its source code on GitHub.

What to know first

  • Supports NTSC ROMs only.
  • Does not support batch patching.
  • Has no command-line support.

Limits

The patcher supports the NTSC version only. It does not provide batch patching or command-line support.

Getting started

  1. Open the patcher website in a browser.
  2. Upload a Super Mario Bros. 2 ROM using the ROM control.
  3. Upload a BPS patch using the patch control.
  4. Select Apply patch.
  5. Save the resulting .nes file.

Verdict

Choose BPS Super Mario Bros. 2 Patcher if you need a free browser-based way to apply a BPS patch to an NTSC Super Mario Bros. 2 ROM. Look elsewhere if you need batch processing, command-line use, or support for another ROM region.

Questions

How much does it cost?

It is free, with a free plan.

Which platforms does it support?

It is presented as a web page with file upload controls.

Which patch format does it use?

It applies BPS patches.

Which ROM region is supported?

The patcher supports the NTSC version only.

Does it check the uploaded files?

Yes. It validates the ROM and BPS patch and displays an invalid-file message when a file is not accepted.

Who is credited on the page?

The page credits Marc Robledo for Rom patcher JS.

Facts from BPS Super Mario Bros. 2 Patcher's own pages

Apply patch
The page provides an Apply patch button. · producks.github.io, 5 Oct 2026
Attribution
The page attributes the ROM patcher JavaScript to Marc Robledo. · producks.github.io, 5 Oct 2026
Browser access
The project is presented as a web page with file upload controls and an Apply patch button. · producks.github.io, 5 Oct 2026
Header adjustment
The patcher automatically adapts the iNES header to match the BPS patch. · producks.github.io, 5 Oct 2026
Header handling
The maker’s code checks and swaps iNES 1.0 and iNES 2.0 headers while validating the ROM. · github.com, 5 Oct 2026
Inputs
The page provides separate upload controls for an SMB2 ROM and a BPS patch. · producks.github.io, 5 Oct 2026
Interface attribution
The patcher page credits Marc Robledo for Rom patcher JS. · producks.github.io, 5 Oct 2026
Invalid ROMs
The page says an invalid ROM may be a bad dump or the wrong region. · producks.github.io, 5 Oct 2026
Limits
The patcher page specifies NTSC support and provides an SMB2 BPS patch upload control. · producks.github.io, 5 Oct 2026
Maker profile
Marc Robledo describes himself as a computer engineer. · marcrobledo.com, 5 Oct 2026
Output
After applying the patch, the script saves the result with a .nes filename based on the patch filename. · github.com, 5 Oct 2026
Patch input
The page lets users upload a BPS patch. · producks.github.io, 5 Oct 2026
Purpose
The patcher applies a BPS patch to a Super Mario Bros. 2 ROM. · producks.github.io, 5 Oct 2026
Region limit
The patcher only supports the NTSC version. · producks.github.io, 5 Oct 2026
Revision handling
The code recognizes ROM and patch checksums for revisions 0 and A, and can apply a revision conversion patch. · github.com, 5 Oct 2026
ROM input
The page lets users upload an SMB2 ROM. · producks.github.io, 5 Oct 2026
ROM region
The patcher supports only the NTSC version; it says an invalid ROM may be a bad dump or the wrong region. · producks.github.io, 5 Oct 2026
ROM revision adjustment
The patcher automatically adapts the ROM revision to match the BPS patch. · producks.github.io, 5 Oct 2026
Source code
The project page links to its source code on GitHub. · producks.github.io, 5 Oct 2026
Source files
The GitHub repository includes BPS handling code, ROM file and hash code, two revision patch files, and the page script and styles. · github.com, 5 Oct 2026
Validation
The patcher checks uploaded ROM and BPS patch files and displays invalid-file messages when they are not accepted. · producks.github.io, 5 Oct 2026

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