Disclaimer: The following is for educational understanding of how archival systems work. Downloading copyrighted ROMs you do not own a physical copy of may violate copyright law in your jurisdiction.
Recognizing that many fans no longer had working hardware, anonymous preservationists began uploading "Decrypted" sets to Archive.org . These collections earned a reputation for "Extra Quality" because they removed the technical barrier to entry. decrypted 3ds roms internet archive extra quality
Super Mario 3D Land (USA) (Decrypted) [!].3ds decrypted 3ds roms internet archive extra quality
The "extra quality" decrypted ROMs on IA are often with performance mods (e.g., disabling 3D shadows in Pokémon X/Y to boost FPS). decrypted 3ds roms internet archive extra quality