You are not alone. In the deep corners of Pokémon speedrunning, glitch-hunting, and modding communities, this phrase has become an urban legend.
The resulting sprite was described as a "furry, brown, pixelated mess with a tail." Users began calling this glitch entity because it had no official name. This glitch was never fully documented on Bulbapedia or Glitch City Laboratories because it was highly unstable—triggering it often corrupted the save file. The "UPD" Controversy A user named "SquirrelKnight" on a Reddit sub-forum for ROM hacking claimed to have created a stabilized patch (the .upd file) that allowed players to encounter the "1636 Squirrel" without crashing the game. The post was deleted within 24 hours, but not before several users downloaded the attached file called FireRed_1636_Squirrels_UPD.rar . 1636 pokemon fire red squirrels upd
Whether you are a glitch hunter looking for the next MissingNo, a ROM hacker searching for obscure resources, or just a confused fan who saw a weird TikTok video—remember that not every mystery has a tangible answer. The "Squirrel" of 1636 might just be a beautiful mistake; a ghost in the machine of the internet itself. You are not alone
These stats, while impressive, are suspiciously balanced. Fans of ROM hacking agree this looks like the work of a skilled modder, not an actual Game Freak leftover. Assuming you do not have the mythical .upd patch, some glitch hunters claim you can still see a remnant of the 1636 Squirrel glitch on original hardware or standard emulators. This glitch was never fully documented on Bulbapedia