The number "1636" is not random; it is the internal serial number or CRC (Cyclic Redundancy Check) checksum associated with the standard North American release of Pokémon FireRed . In the emulation community, serial numbers are crucial. They ensure that the file is a 1:1 copy of the original cartridge.
: Most modern hacks are designed for FireRed v1.0. Using v1.1 or other dumps often leads to "file corrupted" errors during patching. Cleanliness
) ensures that community-made patches apply correctly without crashing the game.
—they typically build them as "patches" designed to be layered over an original game file.