It’s important to clarify that is not an official Nintendo release. Instead, it refers to a specific ROM hack or a modified save state —likely associated with a particular fan-made patch, cheat-enhanced build, or a pre-configured emulator save file. The number “1636” often appears in community labels for ROMs that have been altered to include rare Pokémon, increased difficulty, or quality-of-life changes not found in the original Pokémon FireRed Version (2004).