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Mega Man X5 Improvement Project Addendum

Hack of Mega Man X5


(This entry is referential. Files are in the download link below)


Improvement project for Mega Man X5. It started as a relocalization addendum for the original Mega Man X5 Improvement Project by DarkSamus993 (v0.01.1). It evolved into a set of new features of a scale similar to that of Mega Man X6 Tweaks. Similarly, the project includes a complete documentation of the changes, as well as customization options (in this case, as hex editing instructions)

Features from the original Improvement Project (v0.01.1):

  • Alia’s hints are permanently disabled (replaced by in-game option in Addendum)
  • Keep both character bonuses regardless of which one is chosen
  • Each Heart Tank/Life-Up Part affect both X & Zero
  • Save/Load menu was given a redesign
  • Fixed the injured sprites for X & Zero

Addendum Features:


  • Title Screen restored from the Japanese version (custom graphics by Metalwario64)
  • Mavericks renamed to their Japanese/MMXLC2 names (custom graphics by Metalwario64, based on MMXLC2 new graphics, ripped by DarkSamus993)


  • Main version: Complete script replacement, based on Hondoori’s translation. Edited by Ghaleonh41
  • “No Retranslation” version: the original USA version’s script and font, except for various typos corrected, and Mavericks renamed to their Japanese/MMXLC2 names.


  • Opening theme replaced with the Japanese opening song “Monkey”
  • Ending theme replaced with the Japanese ending song “Mizu no Naka”
  • Tidal Whale’s stage theme changed to the unused track “Deep Sea” (can be switched in-game by holding L1 before the stage starts)
  • X’s “Good” Ending theme changed to the unused track “Armageddon”
  • Dr. Light’s capsule theme changed to the unused “Dr. Light” track (original theme still used in specific places)
  • Stage Select 2 theme changed to the unused “Stage Select” track.

Voice clips restoration:

  • X, Zero and Dynamo voice clips cut from western version
  • Maverick introduction name calls

Parts Unlocking: (No need to waste “hours”. All available in a single playthrough.)

  • Get Life Up/Energy Up at any level
  • Get Life Up+/Energy Up+ (Parts) at any level
  • Get both Parts regardless of Life Up+/Energy Up+ selection.

Enigma/Shuttle RNG exceptions:

  • Enigma/Shuttle launch with no parts will always fail.
  • Shuttle launch with all 4 parts will always succeed.

Stage modifications:

  • Tidal Whale’s Stage: Auto-scrolling segments run faster (100-125% horizontally, 150% horizontally).
  • Tidal Whale’s Stage: U-5555 (mini boss): smaller health bar (75%), but deals more damage (about 150% each attack).
  • Dark Necrobat’s Stage: slowdown gimmick removed.
  • Zero Space 1: the inner walls in the laser segments are now not grabbable.

More options to explore areas:

  • More weapons can break stage objects blocking items in Tidal Whale’s, Shining Firely’s and Dark Necrobat’s stages.
  • Dark Hold protects you from spikes.
  • F-Splasher and can push V-Blocks.
  • More forgiving orb collecting in the Ride Chaser segment (you only need 7 out of 8)

Incomplete Armors:

  • Armors can now be selected as soon as you get a part for it. While incomplete, they’ll be displayed as unarmored X with a custom palette (see details in project thread)


  • Dark Hold: can be cancelled.
  • F-Splasher behaves like a regular air dash (can be cancelled)
  • W-Shredder: input changed to Dash + Special
  • Disabled double tap dash input
  • Falcon Armor: gets a custom air dash with the same properties as the “free move” flight.
  • Gaea Armor: can slide down walls by pressing down. Dash speed penalty removed.


  • Gaea Armor: buster damage against common enemies increased.
  • Z-Saber: damage against main bosses decreased.
  • Z-Buster: startup delay slightly reduced.
  • Longer/harder “X vs. Zero” fight (damage tables reduced)

Misc. polish:

  • Getting the Ultimate Armor through the capsule in Zero Stage 3 will now activate the armor immediately (instead of simply unlocking it for future use)
  • Gaea Armor’s teleport sound effects are now the same as the other armors (instead of using Zero’s)
  • The position of the dash burst sprite when using F-Splasher has been corrected.


  • Alia’s hints can be turned off from the options menu
  • Cutscenes and dialogues skip by pressing START
  • Cheat Code to unlock Ultimate Armor will keep the Fourth Armor selectable
  • Cheat Codes to unlock Ultimate Armor and Black Zero can be combined
  • Faster pause menu transitions
  • Exit Button always available, can be used to skip intro stage.

Additional hacks available in the “readme” as hex editing instructions:

  • Remove Timer
  • Hide Virus Status UI
  • Always get both Life Up and Energy Up upgrades
  • Receive All Parts on the Next Hour
  • Enable Item Drops in Xtreme Mode
  • Change default game options
  • Change number of Parts equipables by armor
  • Enable Fourth Armor Nova Strike
  • Continues restart the stage (experimental)
  • Enable Title Screen voice clip (”Rockman X5″)

There’s also instructions to reverse some of the changes included in the patch.

Recent updates (v2.1.x):


  • (Bugfix) The low health voice clip playing every time you got hit after the first trigger (v2.1.2 bug)
  • (Music) The original Dr. Light theme has been restored for X’s ending cutscenes. Now both versions of the theme have their place in a regular playthrough.


  • (Music) The original Tidal Whale’s stage track and Dr. Light tracks have been restored to their original length.
  • (Music) Holding L1 before Tidal Whale’s stage starts will switch the track for the rest of the playthrough. Do it again to revert it back.


  • (Bugfix) Fixed the Enigma shot freeze (v2.1 bug)
  • Reverted Fourth Armor buster remnants behavior back to original (full rebalancing will be revised in future updates)


  • Major rewrites, making room for more custom code.
  • (Media) The disc now includes all media files previously replaced from disc.
  • Opening: Holding “L1″ before the opening starts will play the variant video (the original USA version)
  • Tidal Whale’s stage: Holding “L1″ before entering the stage will play the variant track (the original “Bubble Crab Remix” track)
  • Dr. Light capsules: the Ultimate Armor capsule will play the variant track (the original “Mega Man X1 Remix” track)
  • You can now make individual changes, such as swapping the main tracks for the variants, through hex editing instructions.
  • Because of this, the “no music changes” and “all music changes except opening” variant patches have been discontinued.
  • (Sound effects) Gaea Armor’s teleport sound effects are now the same as the other armors (instead of using Zero’s)
  • (Unlockables) Getting the Ultimate Armor through the capsule in Zero Stage 3 will now activate the armor immediately (instead of simply unlocking it for future use)

ROM / ISO Information:

  • Mega Man X5 (USA)
  • Serial Number: SLUS-01334
  • MD5: 98c0d278dc4a795a0a7562d950d37cc9




ContributorType of contributionListed credit
acediezHackingAuthor of Addendum. Primary hacking and ASM work
DarkSamus993HackingAuthor of original Improvement Project. Disc files documentation. Maverick names graphics ripped fro
Metalwario64GraphicsAll custom graphics.
Ghaleonh41Script Editing/RevisionScript editing.

User Review Information

A world of difference

Reviewed By: Lite 64 on 24 Jun 2022

Alia’s gone. Enough said.

Ok, ok. Ever since I learned about the Retro engine versions of Sonic 1, 2 and CD, I’ve always been fascinated by the idea of fans making improved versions of games from their favorite series. Not even our childhood classics are perfect after all. As far as MegaMan goes, the first time one such project caught my eye was X6 Tweaks, which is a fantastic hack that makes one of the franchise’s most infamous titles just that much more enjoyable or more tolerable, depending on your perspective.

So, as soon as I heard about the X5 Improvement Project, I just had to check it out. X5, despite its own plethora of stupidity, was very obviously a much more competent game than X6, and its flaws much easier to fix, at least so I’d imagine. I knew this would be a winner from the get-go, and sure enough, it was.

To explain my opinion on X5 itself, I’ve always loved almost everything about it. It has some of the most interesting and inventive levels in the series, the Falcon and Gaea armors add cool ways to replay the game, the bosses are fun and memorable for the most part, the soundtrack might just be my favorite in the franchise, and I could go on. Looking back however, it’s easy to see that for one reason or another, the team couldn’t refine it quite to the same degree as previous entries in the MegaMan X series.

Enter the Improvement Project. It turns what was, in my opinion, already a good game into a (mostly) great one. Just the fact that Alia’s intrusive hints can now be turned off makes a world of difference, the levels flow a ton better.

The other changes are comparatively small, but still immensely welcomed. For instance, Duff McWha- I mean, Tidal Whale’s stage is actually fun now! What was once a slow, backtrack-y mess of a stage with rehashed X2 music is now noticeably faster and more exciting, can be completed in one go with proper routing and features its vastly superior original unused theme. I just find it funny how this one stage was improved upon so drastically, but I’m all for it. It serves as a shining example of the great work done in this hack.

Frankly, my only gripes with it aren’t so much what has been done, but rather what could still be done. Going from the Tidal Whale example, I was a little disappointed that Spiral Pegasus’ stage didn’t undergo similar changes in its elevator segments. Increased speed on them would’ve also made that level more fun by a mile. In the same fashion, Volt Kraken’s stage is downright notorious for its beginner trap before the ‘READY’ text even collapses. Extending the first platform by just a few tiles would give players more time to actually react to it.

Some modifications on a few bosses would’ve also gone a long way, in particular Dark Necrobat could use a more aggressive AI, as his frequent idling makes him quite a pathetic boss. As well, I’d love if there was a way to adjust the Maverick bosses’ HP to a set amount. Though I understand the developers have no intention of creating a patcher like in X6 Tweaks, I believe it’d do wonders in making the hack more customizable, as well as more accessible.

I’m not sure whether or not my suggestions are outside of the scope of what is possible, but regardless: X5 Improvement Project is simply amazing across the board and I can’t thank the team behind it enough. Do yourself a favor and download this hack, especially if you wanted to like X5 but couldn’t due to some of its more pervasive problems. It’s very well worth it, and is now easily my go-to way to replay this game.

Version 2.0.3 Recommended - Yes

User Reviews
Turns this game into a masterpiece.T2927 Jun 20222.0.3Yes
A world of differenceLite 6424 Jun 20222.0.3Yes
X5 is now as good as X1/X2BlazeHeatnix06 May 20222.0.3Yes
Nearly perfect! Here are my issues though.Weird87511 Mar 20222.0.3Yes
X5 now lives up to its potentialturf_main29 Sep 20212.0.3Yes
This is the improvement I've been desperately waiting for.Aceearly199308 Sep 20212.0.2Yes
Launch Success Rate: 100%Eldrethor23 Aug 20212.0.1Yes
Good addendumsMaruju20 Aug 20212.0.1Yes