During the SNES' lifetime there were a wide variety of Copier devices available for dumping and simulating cartridge ROMs.
These devices were the origin of SNES ROM file formats, and responsible for the extra 512-byte headers which appear in many ROM files, as well as the many varied filenames:
- .SMC - Super Magicom
- .SWC - Super Wild Card
- .FIG - Super Wild Card
Some devices also used "trainer" patches, either to make a game compatible with the copier, or to add cheats or other modifications for the player.