It is a standard, unmodified Pokemon Fire Red (U) ROM. The squirrels tag is purely cosmetic. The game boots normally, Professor Oak introduces himself, you pick Charmander/Bulbasaur/Squirtle, and everything runs as expected. The only anomaly is that the filename has no impact on the gameplay.
The name is harmless. It will likely play perfectly fine. However, be aware that some emulator frontends (like LaunchBox or RetroArch with manual scans) might fail to look up box art because the squirrels string confuses the database ID. 1636 - Pokemon Fire Red -u--squirrels-.gba
Furthermore, and No-Intro conventions allow for "bad dumps," "overdumps," and "hacks" to be marked with text in brackets. Over time, bracket text like [h1] (first hack) mutated into alphanumeric codes, and eventually into whimsical phrases. Part 4: Practical Advice – Should You Keep/Use This File? For preservationists: This file is arguably "non-canon" to the official library. If you are building a 1:1 No-Intro set, you should delete 1636 - Pokemon Fire Red -u--squirrels-.gba and replace it with the verified 1636 - Pokemon Fire Red (U).gba (or the newer Pokemon - Fire Red Version (USA, Australia).gba ). It is a standard, unmodified Pokemon Fire Red (U) ROM
Happy hunting, trainer. And watch out for those squirrels. The only anomaly is that the filename has