They keep these games alive by opening up the landscape and creating replayability with brand new challenges. Some hacks add massive improvements, while others are just funny, and some are simply… different. Nowadays the variety of ROM hacks for games like Pokémon Red & Blue is stunning. Modders have been hard at work ever since the games came out, slowly developing the tools needed to better do their transformative work.
And there are some crazy hacks that remains very relevant to this day thanks to the retroactive popularity of games like Pokémon. ROM hacks are among the coolest forms of video game mods.