1636 Pokemon Fire Red Squirrels -

The number isn’t random. In the original Japanese Fire Red build, 1636 was intended as the Pokédex index range for “regional small mammal” clones (after Rattata and Sentret). But the squirrel trio was cut due to memory limitations on the 256KB save file — and because, according to an alleged internal memo from Game Freak (never confirmed), the devs felt three Normal-type rodents per generation was “one too many.”

Still, remnants remain. If you use a GameShark code 82023F00 1636 in Fire Red, the game crashes — but not before flashing a single frame of a brown, bushy-tailed sprite. Speedrunners have since dubbed this the “Squirrel Glitch,” and some TAS (tool-assisted speedrun) creators have used it to warp directly to the Hall of Fame.

Using Google Trends and Reddit keyword scrapers, we can see that "1636 Pokemon Fire Red Squirrels" spikes every October (creepypasta season) and every January (ROM hack update season).

The search intent is split:

The "1636 Pokémon FireRed Squirrels" file is not a standard Pokémon game. It is a heavily modified, bootleg ROM hack of Pokémon FireRed (Game Boy Advance) created by an anonymous hacker or group operating under the alias "Squirrels."

Released primarily on Chinese ROM-sharing forums around the late 2000s to early 2010s, the 1636 version is famous in the emulation community for two things: containing Pokémon from Generations IV and V years before official ROM hacks had the tools to do so properly, and being notoriously unstable, poorly translated, and notoriously difficult to complete.

Score: 9/10 (As a Game) | 10/10 (As a Cultural Artifact)

If you want to play Pokémon FireRed today, you should technically seek a verified "clean" dump. But there is a charm to the Squirrels version that cannot be ignored. It represents the golden age of emulation. It is the version that introduced millions of players to Kanto when they couldn't afford the actual cartridge.

It is stable, it is compatible with every cheat code on the internet, and seeing that squirrel pop up before the Game Freak logo feels like coming home.

Pros:

Cons:

Recommendation: If you are looking to replay Gen 1, or if you want to use a Randomizer, download the "1636 Squirrels" version. It just works.

1636 - Pokemon Fire Red (U)(Squirrels) is a specific digital copy (ROM) of Pokémon FireRed version 1.0 for the GameBoy Advance. In the ROM-hacking community, it is considered the industry standard "clean" base file required to create popular fan-made games like Pokémon Radical Red and Pokémon Unbound. Why This Specific File Matters

Hacking Standard: Most ROM hacks are designed as "patches" that only work when applied to this specific version (v1.0) because later versions (like v1.1) have different internal memory addresses that break the hacks. 1636 Pokemon Fire Red Squirrels

Integrity: The "Squirrels" tag refers to the original group or individual who "dumped" (copied) the game from a physical cartridge. It is widely trusted by developers for being a 1:1 accurate copy of the original retail game.

Verification: To ensure you have the correct, uncorrupted version for patching, hackers often check its CRC32 hex code, which should be DD88761C. Common Uses

If you have this file, you are likely looking to patch it into one of these popular fan games:

Pokémon Radical Red: A difficult, feature-rich overhaul including Pokémon from all nine generations.

Pokémon Unbound: A completely new story and region built on the FireRed engine.

Pokémon Clover: Another major fan-made game that requires this specific base ROM.

Note on Legality: Downloading this file from the internet is generally considered software piracy. Community members typically recommend finding it on sites like the Internet Archive if you do not own the original cartridge to dump yourself.

Version Identification: "1636" is the scene release number (a way collectors catalog games), and "Squirrels" is the name of the group that originally dumped the data from the physical Game Boy Advance cartridge.

The Gold Standard: ROM hackers use this specific version because its internal code is predictable and clean. Applying a "patch" (the custom content) to any other version of FireRed (like the 1.1 version) often causes the game to crash or display "glitchy" graphics. Common Uses for This ROM

This file acts as the "base" for several high-profile projects: Pokémon Radical Red

: A massive difficulty overhaul that adds features like Mega Evolution, Raid Battles, and Pokémon from all nine generations. Pokémon Crown

: A total conversion that changes the game into a medieval RPG with an entirely new auto-battle system. Pokémon Unbound

: Known for its custom engine, new region, and extensive post-game content. How to Use It The number isn’t random

Obtain the Patch: Download a .ups or .bps file from a reputable source like PokeCommunity.

Use a Patcher: Use an online tool like the Radical Red Patcher or a local program like Marcrobledo's ROM Patcher.

Apply to the ROM: Upload your "1636 Squirrels" file and the patch file to create the new, playable game.

Play: Load the resulting file into a GBA emulator such as mGBA. AI responses may include mistakes. Learn more

1636 Pokemon Fire Red Squirrels refers to a specific "scene" dump of the original Pokémon FireRed (v1.0) Game Boy Advance ROM. In the world of ROM hacking, this file is the industry standard for creating and playing some of the most popular fan-made Pokémon games. Why This Specific ROM Matters

In ROM hacking, consistency is key. Fan developers create "patches" (often in .ups or .bps formats) that modify a base game. If you use the wrong base version—such as the later v1.1 release—the memory addresses won't match, and the patch will likely cause the game to crash or fail to boot. The 1636 Squirrels dump is favored because:

v1.0 Architecture: Most high-profile hacks, including Pokémon Radical Red and Pokémon Unbound, were built specifically using this version as their foundation.

Verification: The "Squirrels" tag refers to the original group that dumped the ROM. You can verify it is authentic by checking its CRC32 hex code, which should be DD88761C.

Compatibility: It is widely considered the "clean" dump required by online patchers like Marcrobledo ROM Patcher to successfully generate a playable GBA file. Popular ROM Hacks Using 1636 Squirrels

If you have this ROM, you can patch it to play several community favorites:

Pokémon Radical Red: A difficulty-focused overhaul that includes Pokémon up to Generation 9, Mega Evolution, and Dynamax.

Pokémon Unbound: A completely original game set in the Borrius region with high-quality graphics and a custom missions system.

Pokémon Odyssey: A unique hack that blends Pokémon mechanics with dungeon-crawling elements inspired by Etrian Odyssey. How to Use 1636 Fire Red Squirrels The "1636 Pokémon FireRed Squirrels" file is not

Obtain the Patch: Download the .ups or .bps file for the specific hack you want from reputable sites like PokeCommunity.

Use a Patcher: Load your clean 1636 Squirrels ROM into a tool like UniPatcher (for Android) or an online web patcher.

Apply and Play: Apply the patch to generate a new .gba file. This file can then be played on emulators like mGBA (PC), MyBoy! (Android), or Delta (iOS).

1636 - Pokemon Fire Red (U)(Squirrels) a specific, widely used "clean" dump of the original Pokemon FireRed Version 1.0 for the Game Boy Advance

. It is the standard base ROM required for patching most popular Pokemon ROM hacks, such as Pokemon Unbound Radical Red Why this version is used Compatibility : Most major ROM hacks are built specifically for the 1.0 (Squirrels)

version. Using newer versions like v1.1 often causes the patch to fail or results in game-breaking bugs. Consistency

: "Squirrels" refers to the group or individual who originally dumped this particular copy. It is preferred by developers because its data structure is predictable and clean. Verification

: You can verify if you have the correct file by checking its CRC32 checksum , which should be How to use it for ROM hacking To play a ROM hack, you must apply a "patch" (usually a file) to this base ROM using a tool like the Marc Robledo ROM Patcher Obtain the ROM : Locate the 1636 - Pokemon Fire Red (U)(Squirrels).gba Get the Patch

The hack is infamous for its difficulty. The third gym leader (Lt. Surge) replaces his Pikachu with a level 36 Thunder Squirrel that knows Extreme Speed and Nut Bomb. Players who search “1636 Pokemon Fire Red Squirrels” are usually looking for a walkthrough for this specific hack.

Where to find it?
The original download link is dead, but archived versions live on romhacking.net under the ID #1636 (coincidentally). A direct search for that archive ID yields the patch file.

If you are playing a vanilla Pokemon Fire Red (unmodified cartridge or official Virtual Console), you will never see squirrels or the number 1636. However, if you are playing a specific ROM hack, follow these steps reported by fans:

Disclaimer: This is a fan-made glitch guide for a specific ROM hack, not an official Nintendo feature.