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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

Injects new life to an amazing game!

Reviewed By: Rodimus Primal on 05 Jul 2022

Mega Man 3 is one of my favorite games that I have finished so many times that the stages are like muscle memory. So a hack like this brings a lot of things to the table to make it even more of an enjoyable game then it was before. It fixes bugs and adds features that new and old fans will love.

First is the intro. Every Mega Man game starting with 2 had a story intro except for 3. Now added is a fantastic intro sequence which is fantastic.

Next is the use of the select button to scroll through weapons. This was feature was first present in the SNES classic, Mega Man X, so its very welcome here. It makes me wish it was in all 6 NES Mega Man games.

Also sound effects were added to various parts of the game that complete the game in a lot of ways. The Doc Robots all have their sound effects from Mega Man 2 and Protoman now has his own firing sound effect. An alarm now tells you that you cannot use an Energy Tank if you have full health. Very welcome indeed.

There are two things that some purists may or may not like. First is the DING sound effect added once Mega Man has collected the energy from a defeated boss, and acquires their weapon. While this sounds like something from Mega Man X, and adds a little flair, it can be jarring to someone who has played the game countless times. Also when you collect a power up in the game, it no longer freezes to allow your energy to refill. Instead it is instant, and almost feels out of place if you’ve played many other Mega Man games.

Both are easy to overlook however. There are many other improvements that really make this hack shine. You won’t fall from ladders, Rush doesn’t disappear when pressing start, and there was no slowdowns in gameplay at all.

If you are looking for something that will make Mega Man 3 complete, this is highly recommended.

EDIT - Having tried the latest version, I still highly recommend this hack. However, I personally think some of the changes took a bit more liberty than I liked such as the location of the Boss life bar, the DING sound effect, Spark Man’s added freeze animation, and the life refill being instant. Fortunately there is a text document allowing you to HEX edit all of the changes to your liking. I would prefer if those specific restorations were given in the form of IPS patches to be applied after the fact, but they were relatively easy to change back.

Version 2.31 Recommended - Yes

User Reviews
One Of The Greatest Hacks I Have Ever SeenPrabhu29 May 20232.31Yes
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