A legitimate ISO file should be around 1.35 GB in size. Files that are significantly larger or smaller (such as .exe files masquerading as ROMs) should be avoided entirely. The safest way to obtain a GameCube ISO is to use a compatible optical drive on a PC and software like "CleanRip" or "Raw Dump" to create the file yourself from your own physical copy of the game.
Most people searching for this ISO are legitimate fans who have either lost their original disc, their disc is scratched, or they want to play on a Steam Deck/PC because Nintendo no longer provides a modern way to purchase the original. Paper Mario The Thousand Year Door Gamecube ISO...
