Metroid Fusion, a 2002 GBA metroidvania by Nintendo, follows Samus Aran battling X Parasites aboard a space station. With linear progression and intense action, it sold ~1.6 million copies, a 2025 X retro classic (,).

The .gba ROM (~8 MB) features crisp 16-bit visuals and a tense soundtrack, running smoothly on emulators like VisualBoyAdvance, mGBA, or RetroArch on PC, Mac, or Android. Legally download Metroid Fusion GBA ROM by dumping your cartridge with GBxCart RW (~$50,). Avoid illegal ROM sites like EmulatorGames.net due to malware and Nintendo’s copyright rules (). Buy Metroid cartridges (~$20–$60 in 2025 on eBay) for legal dumping or play on Analogue Pocket. Eradicate X Parasites legally at Gigarom!