You need to know this: Downloading the FireRed ROM is illegal if you do not own a physical copy. However, patching a BPS file to a ROM you dumped yourself is legal in many jurisdictions. The author of this guide does not condone piracy, only the discussion of how the technology works.
If you own a legitimate copy of Pokemon FireRed (GBA), dumping that cartridge to a PC and patching it for personal, portable use falls under Fair Use in the US for format shifting.
When you sit down at a school Chromebook or PC:
For Chromebook users: You cannot run .exe files. Instead, install the "mGBA" app from the Chrome Web Store (if not blocked) or use a web-based emulator like "Afterplay.io" and load your ROM from Google Drive.
The most effective way to play Radical Red "unblocked" is to make the game portable. This means you do not stream the game from a website; you run it entirely from a removable drive or an offline browser app.
Here is the standard method for achieving this:
