Marc Robledo

Web applications

A web app capable of applying (and creating) IPS, BPS, xdelta and other patch formats to retro videogame ROMs, directly from your web browser.

Animal Crossing: New Leaf Savegame editor

A web app that allows you to edit your ACNL map, items & a lot more!
It had been the truly first HTML5 savegame editor back in the day.

Savegame editors

A compilation of more savegame editors released after the HTML5 savegame editing proof with ACNL.
Includes editors for Zelda: Breath of the Wild, Kid Icarus Uprising and more!

Base64 Converter

Online base64 encoder/decoder that supports files and text strings. Built with minimalist UI in mind.

SFV Checker

An online CRC32, MD5 and SHA1 file integrity calculator. No file upload is required, magic is done by the web browser!

Super Game Boy Border Injector

Converts a Game Boy game into a compatible Super Game Boy game by adding your own custom border and palette easily!

Game Boy Camera Manager

A swiss knife for Game Boy Camera data managing. Allows photo extraction, injection, conversion and more.

Console Graphics Converter

Converts PNG images into valid retro console graphics tile binary data with a minimalist GUI.

Send Wii U screenshots to email

Web service that allows to take Wii U screenshots from the console web browser and send them to your email address

Minidex

A lightweight web app that compiles all the locations of all Pokémon across every game in the series. Find Pokémon information quickly and keep track of your Pokédex progress!

Analogue Pocket Image Converter

This web app allows can convert between images and Analogue Pocket OS image formats, allowing you to customize your console's library and UI.

Completion Tracker JS

JS library for creating interactive progress tracking webapps. Comes with a bunch of examples.

RetroArch Playlist Editor

This web app allows you to create and edit .lpl playlist files for RetroArch. Useful to manage playlists in handheld RetroArch versions.

Memory Card Manager JS

Online web-based console memory card manager. Supported platforms: PlayStation and GameCube.

Instant Sounds JS

A customizable sound panel, just for fun. You can easily customize it with your own sounds, upload it anywhere and install it in your smartphone as a PWA.

Massive File Renamer

A web app that can be used to build a script file that will massively rename your file names.

Frontend JS libraries

I have developed several frontend JavaScript libraries. While there are probably better replacements for most of them, I like challenges and prefer to code solutions by myself, adapting them to my own needs and packaging them into easy to install modules.

Input Tags JS

Lightweight library for tag management for your HTML forms with autocomplete features.

Easy Snackbars JS

Lightweight library to easily add customizable snackbars to your website and webapps.

Pretty Dates JS

Lightweight library to turn dates into human-readable formats.

Adaptive Textareas JS

Lightweight library for making <textarea> elements automatically adjust their height to fit their content.

Image Carousel 3D JS

Lightweight library for creating 3D image carousels with smooth animations.

Game development

While I'm currently developing my own videogame, these are some little gamedev pieces of mine.

Ninjack

A Game Boy videogame prototype coded purely in assembly language. This was my degree's final project, and one of the most important challenges I ever had.

Dracula Prototype

A run and gun videogame using a custom HTML5 videogame engine built from the ground up. It was abandoned due to lack of time, but I keep it here as a PoC prototype.

Commercial Game Boy re-releases

I have worked on a bunch of commercial Game Boy re-releases in recent years. Because the original source code had been lost, my role was to reverse-engineer the games in order to add new features:

Baby T-Rex

A platformer that recently got a second chance. I expanded the ROM to add new splash screens and fixed compatibility issues with the new cartridge PCB.

Chikyū Kaihō Gun ZAS

A cult-classic shoot-'em-up that was never released outside Japan. I adapted the game to include new splash screens using the original engine code without any dirty workarounds.

Gamedev collaborations

I have developed the global cross-platform leaderboards for the following videogames:

Videogame translations and hacking

I grew up with video games like many others and to this day they are still a big part of my life.
Due to this I am deeply committed to the preservation of video game history. For me, this means more than just preserving copies of every game; it involves adapting classic games to ensure they remain accessible and enjoyable for as many people as possible.
For that reason, many years ago, I decided to contribute to the video game scene by translating games from Japanese to English and offering improved versions of classic games that deserved a second chance.

Donkey Kong DX

Coming 2026!

Mega Man World 3 DX

A colorized remaster of Game Boy Mega Man III that works on real GBC hardware

Mega Man World 4 DX

A colorized remaster of Game Boy Mega Man IV that works on real GBC hardware

Mega Man World 5 DX

A colorized remaster of Game Boy Mega Man V that works on real GBC hardware

Mole Mania DX

A colorized remaster of Game Boy Mole Mania that works on real GBC hardware

Ninja Gaiden Shadow DX

A colorized remaster of Game Boy Ninja Gaiden Shadow that works on real GBC hardware

Dr. Mario DX

A colorized remaster of Game Boy Dr. Mario that works on real GBC hardware and includes three new playable characters

Samurai Kid - English translation

Full english translation for Samurai Kid, a Japan exclusive puzzle platformer

Mobile Golf - English translation

Full english translation for Mobile Golf, a Japan exclusive Mario Golf sequel

Super Robot Pinball - English translation

Full english translation for Super Robot Pinball, a Japan exclusive game made by Pokémon Pinball developers

King of Fighters: Battle de Paradise - English translation

Full english translation for King of Fighters: Battle de Paradise, a Japan exclusive board game based on King of Fighters series

Game Boy Advance Palette Restorations

A compilation of hacks that restore and fix some SNES to GBA ports whose colors were too bright to compensate the console's dark screen.

More hacks and translations

You can find all my game modifications in my Romhacking.net profile page, including other smaller hacks and translations.

Podcasting & talks

I also like talking about videogames! Currently I participate in two podcasts (spanish speaking only) and I also give occasional talks about videogame preservation and ROM hacking.