It is not simply a "harder" FireRed. It is a designed specifically to enforce the spirit of the Nuzlocke challenge, eliminating the loopholes players usually exploit.
Before you click any link, you need to understand what you’re getting into. The term "Ludlocke" is a fusion of two words: "Ludwig" (the creator, a French streamer and modder known as Ludwig or Ludi in the community) and "Nuzlocke" (the self-imposed challenge rules). ludlocke download
: Many players create their own Ludlocke experience by downloading the Universal Pokémon Randomizer . This tool allows you to randomize wild encounters, trainer teams, and item locations, which is a staple of Ludwig’s runs. It is not simply a "harder" FireRed