: It is known as a "clean ROM," meaning the code is an exact 1:1 replica of the retail game without any pre-applied cheats, intro screens, or corrupted data that could interfere with complex patches. Usage in Popular ROM Hacks
: Known for its extreme difficulty and modern features, the Radical Red patcher specifically requests a "1636 Squirrels" ROM to ensure the Gen 9 Pokémon and Mega Evolution mechanics function correctly. 1636 Pokemon Fire Red - U-- Squirrels
: Most modern hacking tools and expansion frameworks, such as the Complete FireRed Upgrade (CFRU) , are built exclusively for FireRed v1.0. Using the later v1.1 release often causes game-breaking bugs because the memory addresses (offsets) for data are shifted. : It is known as a "clean ROM,"