Pokémon Mario Red And Luigi Green: Iconic Nintendo Worlds Intertwine In New Rom Hack In Development

A new ROM hack called Pokémon Mario Red and Luigi Green has recently been announced, merging two of Nintendo’s most enduring franchises into a single project. This inventive spin on the original Pokémon adventures replaces familiar pocket monsters with beloved Mushroom Kingdom characters, which is a really interesting project.

Mario has been synonymous with Nintendo since the 1980s, headlining titles from the earliest NES releases to more modern platforms, while Pokémon, first published in 1996 for the Game Boy, quickly became a worldwide sensation. Both remain central pillars of Nintendo’s heritage, with each franchise having introduced millions to gaming in their formative years. By fusing these icons, the ROM hack pays homage to the playful exploration found in classic Pokémon while embracing the whimsical spirit of the Mario series.
Hey everyone!
— DogPond4 (@DogPond4) March 3, 2025
It's time for me to officially announce the ROM hack I'm working on: Pokémon Mario Red & Luigi Green!
All 151 Pokémon will be replaced with Mario characters, along with plenty of surprises! pic.twitter.com/VK6QDK1cFU
From a technical perspective, ROM hacking is an intricate process that involves altering a game’s original data to introduce new visuals, storylines, or gameplay mechanics. While the practice has its roots in the broader retro gaming community. It is going to be very interesting to see how DogPond4 approaches the balance of the characters, will he simply lift the stats from the Pokemon and assign them to the Mario characters, and which ones will align with the different Pokemon types? I already like the approach that has been shared regarding how the evolutions and shinies will work in the hack.

Interestingly, the original Pokémon Red and Green for the Game Boy ranked among the best-selling RPGs of all time, with over 30 million copies sold worldwide. The ongoing popularity of Pokémon, combined with the universal appeal of Mario, underscores the significance of this hybrid hack for classic games collectors and Nintendo devotees alike. You can follow the project, by following DogPond4 on X.
Keep your classic games safe with [RetroShell], designed to protect your retro collection. For the latest updates on retro gaming, [subscribe to our free Substack], delivered to your inbox every Monday!