Internet Archive hosts several major collections of decrypted 3DS ROMs , which are essential for use with emulators like (a successor to Citra and Lime3DS)
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Many users upload curated lists that group files by region (USA, EUR, JPN) or by specific release groups, making it easier to filter out unwanted updates or DLCs. Top Decrypted 3DS ROMs: The Fan Favorites JPN) or by specific release groups