Most major overhaul mods, such as Pokemon Radical Red or Pokemon Unbound, are built specifically to interface with the v1.0 memory offsets. If you attempt to apply a patch to a v1.1 ROM, the game will usually crash or fail to boot because the data addresses have shifted. Similarly, version 1.0 contains specific glitches and internal coding behaviors that speedrunners exploit to shave minutes off their completion times. Technical Specifications and Verification
FireRed v1.0 uses various file formats, including: firered v1.0 rom