Mike Tyson's Punch-out Rom Hacking Tool

2 Player Mode - That's Right! Controller 2 Controls the CPU and MUCH MUCH more.

Created by Nick

Screenshot of Mike Tyson's Punch-out Rom Hacking Tool

GAMEMade for Mike Tyson's Punch-Out!! (Nintendo (NES), 1987). See the game, ROM info and prices.

About this release

Load your own Punch-Out!! ROM and change any boxer’s punch damage and speed, their dialog and profile text, Little Mac’s power, the fight order, CPU patterns and portraits. You can also turn on 2-player controls and debug options. Save the result as an IPS patch or a ready-to-play ROM. Your ROM stays in your browser and is never uploaded.

How to use it

Click "Open the tool". It rClick “Open the tool”, load your Mike Tyson’s Punch-Out!! (USA) .nes file, make your changes, then use the Save patch tab.uns right in your browser, with nothing to install.

Changelog

Version	Date	Notes
1.0.0	Oct 27, 2026	Version 1.0, the official release. Why: everything is tested and ready. New since the last version: one-click presets (2P Mode, Enhanced, Exhibition, Randomizer) with levels, randomizer levels from Mild to Nightmare plus CHAOS and re-roll, a table of what got randomized, a file name box for your saves, a Cheats tab with tested Game Genie codes, a new game-style look with menu sounds, and Latest News and FAQ that fold away.
1.1	Oct 26, 2026	Better UI. Updated logic for Randomizer. Fixed glitch where king hippo would keep getting up. :)
1.1	Oct 21, 2026	This is the official release for the Punch-out Rom Hack Creator
1.0	Oct 17, 2026	First release.