1636 Pokemon Fire Red - U-- Squirrels May 2026

In the world of ROM (Read-Only Memory) emulation, every game file has a unique CRC-32 checksum or a SHA-1 hash. These are numbers (often hexadecimal, but sometimes decimal) that identify a specific ROM dump. “1636” could be part of:

In ROM naming conventions:

Fire Red (U) for Game Boy Advance is identical to the US retail cartridge, released on September 9, 2004. It features:

The ROM hack subreddit initially dismissed “1636 Pokémon Fire Red - U-- Squirrels” as a low-effort meme. But as more players documented identical behavior across emulators (mGBA, VBA-M, even original hardware via EverDrive), interest grew.

User SquirrelKing2024 wrote:
“I thought it was a virus at first. But it’s not malicious. It’s just… squirrels. I beat the Elite Four with a team of five squirrels and one ‘Electric Squirrel.’ The Hall of Fame music cuts to 10 seconds of nuts dropping on a wooden floor.” 1636 Pokemon Fire Red - U-- Squirrels

Another user, OakIsWrong, claims:
“There’s a hidden ending. If you complete the Pokédex (all 151 squirrels), Professor Oak gives a speech about the ‘true nut’ being friendship. Then the game deletes itself.”

This last claim remains unverified, as no one has yet caught “Squirrelthree” (legendary, appears only on Route 22 during a thunderstorm while your party contains exactly 6 Acorns—an item that doesn’t exist in the base game).

You have the "Gold Standard" ROM.

Tip: Since you have the clean Squirrels ROM, if you ever decide you want a different story (like a harder difficulty or a brand new region), you have the exact file required to patch most ROM hacks available online. In the world of ROM (Read-Only Memory) emulation,

An Action Replay code like “1636” could be an incomplete item modifier. For example, in Fire Red (U), the code for Rare Candy in slot 1 of PC is often:

820257C4 0044

No “1636” there. However, some cheat databases list codes like:

Verdict: “1636” is likely a file marker from a ROM set, possibly No-Intro naming: 1636 - Pokemon Fire Red (U)(Squirrels).gba — where “1636” is a serial number from a scene release group, and “Squirrels” is an internal folder or tag.

At first glance, the 16 MB .gba file appears to be a standard ROM of Pokémon Fire Red Version (2004, Game Boy Advance). However, upon emulation, the game behaves… erratically. Fire Red (U) for Game Boy Advance is

The title screen remains unchanged—the familiar Charizard vs. Venusaur silhouette, the iconic “Pokémon” cry. But press Start, and you are not greeted by Professor Oak. Instead, a single line of garbled text appears:

“RIVAL’S name: CHITTER”

From there, the game unfolds almost identically to the original—except for one glaring detail. All Pokémon sprites have been replaced with squirrels.