To ensure you have downloaded the authentic, uncorrupted "Squirrels" dump needed for rom hacking, extract the .gba file and run it through a checksum tool to check its .

The Pokémon Fire Red -u--squirrels- ROM is a hack of the original Pokémon Fire Red game, which was released in 2004 for the Game Boy Advance. This modified version is designed to offer a fresh and exciting experience for fans of the series. The "u--squirrels" part of the title suggests that this ROM hack may have been created by a developer or enthusiast with the username "u--squirrels".

Look for established internet preservation libraries or community-vetted emulation subreddits. Avoid any website that forces you to download an .exe file or an "installer manager" to get your ROM. A real GBA ROM will always extract into a .gba file. Step 2: Verify the File Hash