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Mega Man 3 Improvement

Hack of Mega Man 3


This is an improvement patch for Mega Man III/Rockman 3. It has many improvements to the game + MANY bugfixes that existed originally in MM3.

Anyone is free to use this for their own Mega/Rock 3 hacks, and any new ones in the future.

Please only use the appropriate patch depending on what ROM your using. The megaman3 patch is only for the English version and the rockman3 is only for the Japanese ROM.

The author will not list all the changes here, they are already listed in the readme. A YouTube video was uploaded also to demonstrate many of the changes. Please see the “Video Comments.txt” for the link to the YouTube video and to use as a guide to note the changes you’ll see demonstrated.

An ASM file was used from the Japanese ROM hacker named Puresabe, known best for Rockman 4 MI (Minus Infinity). It implements some gameplay physics mods that he presented to me. NOTE: It already has been applied to both English and Japanese versions of the patch.

ROM / ISO Information:

  • File: Rockman 3 - Dr. Wily no Saigo! (J).nes
  • CRC32: FCE6CEA2
  • MD5: 85944FB5 8B6AFC53 F8D20B8C 1E19A0AB
  • SHA1: E82C532D E36C6A5D EAF08C62 48AEA434 C4D8A85A
  • *
  • File: Mega Man III (U) [!].nes
  • CRC32: BE6DBB5D
  • MD5: 1B5BDD75 9448390A BCC9D481 E8D83700
  • SHA1: 0728DB6B 8AABF7E5 25D930A0 5929CAA1 891588D0



RHDN Hack ImageRHDN Hack ImageRHDN Hack ImageRHDN Hack Image


ContributorType of contributionListed credit
kuja killerHacking

User Review Information

The Definitive Edition of Mega Man 3 is Finally there

Reviewed By: Aceearly1993 on 17 Sep 2022

The very first difference players would’ve noticed, is the inclusion of an actual Opening Sequence. The artworks of main characters are very nicely drawn and to the point I almost mistaken it to some of the works from Capcom themselves. Similarly, the Wily Castle discovered scene gets an improvement by mixing the final rendition with unused variant, which is fairly good.

The next plus point is inclusion of fast weapon swap function. Although the fast weapon switch is not as convenient and manageable as the Rockman Complete Works version on PlayStation 1, it’s at least implemented and functional, making it one of the most major improvements over the original.

Then it comes to the removal of slowdowns. Honestly my impression about slowdown removal is mixed as Doc Robot Quick immediately became irritating without the influence of slowdowns, but at least it offers a more speedy, more generally acceptable overall tempo like in the Rockman Complete Works version.

There’re more minor adjustments serves as QoL fixes, but my most favourite would be tweaking the play length of Proto Man whistle theme at credit so that it (finally!) gets a complete one loop. This helps players feel more achieved after beating the game, while in the original it cuts abruptly right before boss information scene of 8 bosses, makes an impression of the game being somehow rushed. There’re also some tweaks to walls and stage structures in order to prevent conditions that would cause softlock, I appreciate the work done by those talented people behind this hack.

Recommended to all Mega Man fans, all 2D action fans and everyone in the rom hacking community (or rom hack collecting fans) as this hack is well worth for one or two tries with all these improvements, it offers to us one possible rendition of what Mega Man 3 NES could’ve been if with more polish and more segments of work period before it was released, and truly demonstrated that there’s still potential on the good old NES 8-bit structures.

Version 2.31 Recommended - Yes

User Reviews
The Definitive Edition of Mega Man 3 is Finally thereAceearly199317 Sep 20222.31Yes
Mega Man 3 perfected at lastSupergamerguy20 Mar 20222.31Yes
This is niceInAnotherCastle14 Jun 20212.22Yes
A Great Effort Gets Carried AwayMr. Pennington07 Apr 20202.22No
FIXED! It is playable. (Megaman 3 Improvement)diablo66617 Oct 20212.21Yes
Simply AMAZING !star_scream164613 Nov 2019N/AYes
Gold Standard for Improvement HacksG30FF13 Nov 20192.2Yes
An obvious replacement marred by one major flawThirteen 135522 Sep 20192.1Yes
Some VERY glaring issues with an otherwise solid hack...BlazeHeatnix29 Sep 20182.1Yes
Absolutely The Definitive Version of Megaman 3Eldrethor16 Feb 20182.1Yes
The way that it should be!Greyfox06 Jan 20162.1Yes
HIGHLY RECOMMENDED!!!Duke2go26 Jun 20152.1Yes
Injects new life to an amazing game!Rodimus Primal05 Jul 20222.31Yes
The ultimate version of Megaman 3Satoshi_Matrix15 Nov 2012N/AYes