: To ensure you have the "extra quality" or "clean" version required for patching, the file should have a CRC32 hex code of DD88761C . Why is this version popular?
Additionally, I should consider that the user might be misphrasing the query and could be referring to a specific ROM hack. For example, "Pokémon FireRed U" is the official USA version, so maybe 1636 is a code used in hacking communities. However, I can't confirm if 1636 is a recognized code here. 1636 pokemon fire red u squirrels rom extra quality